The length of a rectangular yard is 9 meters if 23 meters of fencing is required to fence the yard find the width

Question

The length of a rectangular yard
is 9
meters. If 23
meters of fencing are required to fence the yard
find its width.

Answer 1

We use the formula for calculating  perimeter of a rectangle. We solve for width w.

 

P= 2l + 2w

23 =2•9 +2w

2w = 23 - 18

2w = 5

w = 2.5

 

the width of the rectangle is 2.5 meters.

Answer 2

L = length = 9 m

W = width = ?

P = perimeter = 23 m

 

P = 2(L + W)

 

Solve for W and get

 

W = P/2 - L = (23/2 - 9) m = 2.5 m