the length of a rectangle is twice the breadth . if the area is 128 cm 2 , determine the length and the breadth .
we are given length l = 2 b and l × b = 128 ∴ 2 b × b = 128 2 b ^ 2 = 128 b ^ 2 = 64 b = ± 8 but breadth must be positive , therefore b = 8 cm , and l = 2 b = 16 cm . answer is b .
multiply(sqrt(divide(128, const_2)), const_2)