Question

The length of a rectangular field is twice its breadth . If the perimeter of the field is 150m,find the dimensions of its sides

Answer 1

let breadth be x and length is 2x.
p=2(l+b)
150=4x+x
5x=150
x=30

Answer 2

L=2B
B=b
perimeter=2 (l+b)
=2(2b+b)
given, perimeter=150
6b=150
b=150/6
b=25
l=2B=2*25=50
Hope it will help you