Question

B. Find the width of a rectangle if its length is 5 more than the width and its perimeter is 90 cm.

Answer 1

Width is 20cm

Explanation:

Step one:

Given data

let the width be x

W= x

L= x+5

P= 90

Step two:

The expression for the perimeter is

P= 2L+2W

90= 2*x+2(x+5)

90= 2x+2x+10

collect like terms

90-10=4x

80= 4x

divide both sides by 4

x= 80/4

x= 20