Question

A rectangular room is 3 times as long as it is wide, and its perimeter is 40 meters. Find the dimension of the room.

The length is : ______ meters and the width is ______ meters.​

Answer 1

Explanation:

Perimeter is equal to 2 times the length added to 2 times the width.

In this questions the perimeter = 40

width = w

length = 3w

Equation is

40 = 2(3w) + 2(w)

40 = 6w + 2w

40 = 8w

divide each side by 8

40/8 = 8w/8

5 = w

So the length = 15 meters and the width is 5 meters.

Length is 3 times the width of 5 = 15