19. The area of a rectangle 144 cm long is same as that of a square of side 84 cm. The width of the rectangle is (a) 7 cm (b) 14 cm (c) 49 cm (d)28cm
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length * breadth = side ²
144 * x = 84*84
x = 84*84 /144
7056/144
c = 49
so the width of the rectangle is 49 cm .
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