Question

A rectangle has a length of 8.3 cm and a perimeter of 22.4 cm.

What is the width of the rectangle in decimal form?

Answer 1

22.4 divided by 2 = 11.2

11.2 - 8.3 = 2.9 is the width

Answer 2

Let

x-------> the length of the rectangle

y------> the width of the rectangle

we know that

the perimeter of a rectangle is equal to

`P=2x+2y`

In this problem we have

`x=8.3\ cm\\P=22.4\ cm`

substitute in the formula

`22.4=2*8.3+2y`

Divide by
`2` both sides

`11.2=8.3+y`

Solve for y

`y=11.2-8.3`

`y=2.9\ cm`

therefore

the answer is

`2.9\ cm`