Question

The length of a rectangle is 6m less than 3 times its breadth.If its perimeter is 148m,find the dimensions of the rectangle

Answer 1

let breadth of rectangle = x.
so length = 3x-6m.
perimeter of rectangle = 2(l+b)
148m = 2 ( x + 3x-6m )
148m =2 ( 4x -6m )
148m =8x - 12 m
148m + 12m =8x
160m =8x
x =20m =breadth
length = 3x-6m
=3 ×20m-6m
= 54m