Question

29. The ratio between the perimeter and the breadth of a rectangle is 5 : 1. If the area of the rectangle is 216 sq. Cm, what is the length of the rectangle

Answer 1

let the perimeter be 5x

and breath be x

length=perimeter-breath

l=5x-x=4x

area=l×b

area=4x(x)=4x^2

216=4x^2

216/4=x^2

54=x^2

√54=x=3√6