The perimeter of a rectangle is 42 feet. If the length is 10 feet, what is the width?

Answer 1

For a rectangle, the perimeter formula is as follows:

P = 2(l+w) = 2l + 2w

P is perimeter

l is length

w is width

In this problem, we are given P and l. Therefore, let us plug those values in so we can find out what w is.

P = 42ft; l =10ft

42 = 2(10) + 2w

42 = 20 + 2w

42-20 = 2w

22 = 2w

22÷2 = w

11 = w

The width is 11 feet