Question

the length is twice its breadth find the length if its perimeter is 90 cm

Answer 1

15 units is the answer

Answer 2

let breadth be x
length = 2x

Perimeter = 90cm
2(l+b) = 90cm
90 = 2(2x+x)
90/2= 3x
45/3 =x
x= 15cm

length = 2x = 2×15=30cm