Question

A rectangular room is twice as long as it is wide, and it’s perimeter is 60 meters. Find the length

Answer 1

20 m

Explanation:

The width is half the length, and the perimeter is the sum of the lengths of all sides. We can write the equation of the perimeter as ...

... 60 m = L + L/2 + L + L/2

... 60 m = 3L . . . . . collect terms

... 20 m = L . . . . . . divide by 3

The length of the room is 20 m.