Question

Breadth of the rectangle is 2 by 5 of its length and perimeter is 28 m find the length and breadth

Answer 1

let length =x then breadth =2by5x
perimeter=2 (l+b)
28=2 (x+2by5x)
28 by 2=x+2by5x (lcm of 1and 5 is 5)
14=5x+2x by 5
14=7x by 5
14×5=7x
70=7x
x=70 by 7
x=10



length=x=10
breadth=(2by5)x
=(2by5)10
=2×2
=4