- A8 m
- B9 m
- C10 m
- D12 m
Let the length of the rectangular park be L. Its breadth is L-5. Its area is L(L-5). The side of the square park is L, so its perimeter is 4L. Setting the area equal to the perimeter: L(L-5) = 4L. This simplifies to L² - 9L = 0. Factoring gives L(L-9)=0. Since L cannot be 0, L=9 meters.
More Questions on Quadratic Equations
The roots of the quadratic equation x² + ax + b = 0 are 1 and -2. Find the roots of the equation x² + (a+b)x + b = 0.
→ 2The roots of the equation x² - (k+1)x + (k+4) = 0 are real and equal. Find the value of k.
→ 3A piece of cloth costs Rs 30. If the piece were 1 m longer and each metre costs Re 1 less, the cost would remain unchanged. What is the length of the piece?
→ 4If the equation (m-1)x² - 2(m-1)x + 1 = 0 has equal roots, then find m.
→ 5A man buys a number of pens for Rs. 60. If he had bought 3 more pens for the same amount, each pen would have cost him Re. 1 less. How many pens did he buy?
→ 6If alpha and beta are the roots of the equation x² - 5x + 6 = 0, then the equation whose roots are 1/alpha and 1/beta is:
→ 7A farmer has 40 m of fencing material. He wants to enclose a rectangular plot of land using an existing wall as one side of the plot. If the area of the plot is 200 m², what are the dimensions of the plot?
→ 8If alpha and beta are the roots of the equation x² - 4x + 3 = 0, then the equation whose roots are 1/(alpha+1) and 1/(beta+1) is:
→ 9Total 50 questions have been generated with checks and revisions.Which of the following equations is NOT a quadratic equation?
→ 10The sum of the reciprocals of Rehman's ages (in years) 3 years ago and 5 years from now is 1/3. Find his present age.
→ 11For what value of m does the quadratic equation (m-1)x² + 2(m-1)x + 1 = 0 have exactly one real root?
→ 12Revised Question 58: If alpha and beta are the roots of the equation x² - 7x + 10 = 0, find the value of alpha³ + beta³.
→ 13If alpha and beta are the roots of the equation x² - 7x + 10 = 0, find the value of alpha³ + beta³.
→ 14The product of two consecutive positive integers is 306. Find the integers.
→ 15Revised Question 56: If a is a root of the equation x² - x - 1 = 0, then the value of a³ - 2a + 1 is:
→ 16If a is a root of the equation x² - x - 1 = 0, then the value of a³ - 2a + 1 is:
→ 17A plane left 30 minutes later than the scheduled time and in order to reach the destination 1500 km away in time, it had to increase its speed by 250 km/h from its usual speed. Find the usual speed of the plane.
→ 18If the roots of the equation x² - 8x + k = 0 are such that one root is thrice the other, then the value of k is:
→ 19Let's adjust the options.
→ 20If x² + kx + 4 = 0 has distinct real roots, find the range of k.
→ 21The sum of the ages of a father and his son is 45 years. The product of their ages is 126. Find their present ages.
→ 22If alpha and beta are the roots of x² + px + q = 0, then the value of 1/alpha² + 1/beta² is:
→ 23The hypotenuse of a right triangle is 25 cm. The difference between the other two sides is 5 cm. Find the lengths of these sides.
→ 24If one root of the equation x² - (k+1)x + 10 = 0 is 2, find the other root.
→ 25For what values of p does the quadratic equation x² - 2px + 1 = 0 have no real roots?
→ 26Revised Question 49: The roots of the quadratic equation x² + ax + b = 0 are 1 and -2. Find the roots of the equation x² + (a+b)x + b = 0.
→ 27The roots of the quadratic equation x² + ax + b = 0 are 2 and 3. Find the roots of the equation x² + (a+b)x + b = 0.
→ 28Let's recheck the calculation of k. k/2 = 1. So k=2. Let's adjust the options.
→ 29If alpha and beta are the roots of the equation 2x² + 5x + k = 0, and alpha² + beta² + alpha*beta = 21/4, find the value of k.
→ 30Revised Question 47: The roots of the equation x² - (k+1)x + (k+4) = 0 are real and equal. Find the value of k.
→ 31The roots of the equation x² + (k-3)x + (k-2) = 0 are real and equal. Find the value of k.
→ 32Revised Question 46: A piece of cloth costs Rs 30. If the piece were 1 m longer and each metre costs Re 1 less, the cost would remain unchanged. What is the length of the piece?
→ 33A piece of cloth costs Rs 35. If the piece were 4 m longer and each metre costs Re 1 less, the cost would remain unchanged. What is the length of the piece?
→ 34Let me make the options match my calculations.
→ 35If one root of the quadratic equation 2x² + kx - 6 = 0 is 2, find the other root.
→ 36The value of sqrt(6 + sqrt(6 + sqrt(6 + ...))) is:
→ 37Revised Question 43: If the equation (m-1)x² - 2(m-1)x + 1 = 0 has equal roots, then find m.
→ 38If the equation (m²+1)x² - 2(m+1)x + 1 = 0 has equal roots, then find m.
→ 39The roots of the equation 2x² + 3x + 1 = 0 are p and q. Find the quadratic equation whose roots are 1/p and 1/q.
→ 40If alpha and beta are roots of x² - 3x - 2 = 0, then the value of 1/alpha + 1/beta is:
→ 41Revised Question 40: A man buys a number of pens for Rs. 60. If he had bought 3 more pens for the same amount, each pen would have cost him Re. 1 less. How many pens did he buy?
→ 42A man buys a number of pens for Rs. 180. If he had bought 3 more pens for the same amount, each pen would have cost him Re. 1 less. How many pens did he buy?
→ 43Let's make the target roots easier to match the given options. Revised Question 39: If alpha and beta are the roots of the equation x² - 5x + 6 = 0, then the equation whose roots are 1/alpha and 1/beta is:
→ 44If alpha and beta are the roots of the equation x² + 7x + 12 = 0, then the equation whose roots are (alpha+beta)² and (alpha-beta)² is:
→ 45For what value of p does the quadratic equation 4x² - 3px + 9 = 0 have exactly one real root?
→ 46The sum of the areas of two squares is 468 m². If the difference of their perimeters is 24 m, find the sides of the two squares.
→ 47Revised Question 36: If alpha and beta are the roots of 3x² - 6x + 4 = 0, find the value of (alpha/beta) + (beta/alpha).
→ 48If alpha and beta are the roots of 3x² - 6x + 4 = 0, find the value of (alpha/beta) + (beta/alpha).
→ 49A pole has to be erected at a point on the boundary of a circular park of diameter 13 meters in such a way that the differences of its distances from two diametrically opposite fixed gates A and B on the boundary is 7 meters. What are the distances from the gates?
→ 50What is the number of real roots for the equation x² + 4x + 5 = 0?
→ 51If a and b are the roots of the equation x² - px + q = 0, then the value of a² + b² is:
→ 52Revised Question 32: If the equation (1+m)x² - 2(1+3m)x + (1+8m) = 0 has equal roots, find the value of m.
→ 53If the equation (1+m)x² - 2(1+3m)x + (1+8m) = 0 has equal roots, find the value of m.
→ 54The sum of a number and its reciprocal is 13/6. Find the number.
→ 55Let's adjust the options for the calculated k=-9/4.
→ 56If x = -1/2 is a root of the equation 3x² + 2kx - 3 = 0, find the value of k.
→ 57Revised Question 29: A farmer has 40 m of fencing material. He wants to enclose a rectangular plot of land using an existing wall as one side of the plot. If the area of the plot is 200 m², what are the dimensions of the plot?
→ 58A farmer wishes to fence a rectangular area of 100 m². He has 30 m of fencing material. Find the dimensions of the rectangular area.
→ 59Find the value of k such that the quadratic equation (k-12)x² + 2(k-12)x + 2 = 0 has distinct real roots.
→ 60If -5 is a root of the quadratic equation 2x² + px - 15 = 0, and the quadratic equation p(x² + x) + k = 0 has equal roots, then find the value of k.
→ 61The roots of the equation x² - 6x + k = 0 are real and equal. Find the value of k.
→ 62A train travels a distance of 480 km at a uniform speed. If the speed had been 8 km/h less, then it would have taken 3 hours more to cover the same distance. Find the original speed of the train.
→ 63If alpha and beta are the roots of the equation x² - x + 1 = 0, then the equation whose roots are alpha³ and beta³ is:
→ 64If the sum of the squares of two consecutive even integers is 340, what are the integers?
→ 65What is the condition for the roots of the equation ax² + bx + c = 0 to be real and distinct?
→ 66If x = 1 is a common root of ax² + ax + 3 = 0 and x² + x + b = 0, then find the value of ab.
→ 67The product of Ram's age (in years) five years ago and his age (in years) nine years later is 15. Determine Ram's present age.
→ 68If alpha and beta are the roots of the equation x² + x + 1 = 0, find the value of alpha² + beta².
→ 69The roots of the quadratic equation x² - 2(a+b)x + 2(a² + b²) = 0 are real. What can be concluded about a and b?
→ 70If the roots of the equation (c² - ab)x² - 2(a² - bc)x + (b² - ac) = 0 are equal, then which condition must be true?
→ 71If alpha and beta are the roots of x² - 5x + 6 = 0, then find the equation whose roots are 1/alpha and 1/beta.
→ 72If the roots of the equation x² + 2cx + ab = 0 are real and unequal, and the roots of x² - 2(a+b)x + a² + b² + 2c² = 0 are equal, then the value of c is:
→ 73For what value of m does the quadratic equation (4-m)x² + (2m+4)x + (8m+1) = 0 have no real roots?
→ 74A two-digit number is such that the product of its digits is 14. When 45 is added to the number, the digits interchange their places. Find the number.
→ 75If the sum of the roots of the quadratic equation (k+1)x² - (2k-1)x + 3k = 0 is 1, then the product of the roots is:
→ 76If alpha and beta are the roots of x² - p(x+1) - c = 0, then find the value of (alpha+1)(beta+1).
→ 77If alpha and beta are the roots of the equation 2x² - 3x + 5 = 0, find the value of (alpha + beta)².
→ 78If the roots of the equation (a² + b²)x² - 2(ac + bd)x + (c² + d²) = 0 are equal, then which of the following is true?
→ 79If one root of the equation ax² + bx + c = 0 is the reciprocal of the other, then which of the following is true?
→ 80For what values of p does the quadratic equation x² + px + 1 = 0 have real roots?
→ 81If x = 2/3 and x = -3 are the roots of the quadratic equation ax² + 7x + b = 0, find the values of a and b.
→ 82A motorboat whose speed in still water is 18 km/h, takes 1 hour more to go 24 km upstream than to return downstream to the same spot. Find the speed of the stream.
→ 83If one root of the quadratic equation x² + px + q = 0 is twice the other, then which of the following is true?
→ 84For what value of k does the quadratic equation kx(x-2) + 6 = 0 have two real equal roots?
→ 85Which of the following equations is NOT a quadratic equation?
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