The area of a rectangle is thrice that of square. Length of the rectangle is 40 cm and the breadth of the rectangle is ( 3 / 2 ) times that of the side of the square. The side of the square in cm is?
Correct Answer: 20
Explanation:
Let the side of the square = y cm
Then, breadth of the rectangle = 3y/2 cm ∴ Area of rectangle = (40 x 3y/2) cm2
= 60y cm2 ∴ 60y = 3y2
∴ y = 20 Hence, the side of the square = 20 cm
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