Question

The perimeter of a rectangular pool is 240 yd. If the length is 30 yd unless the four times the width, find the length and the width.

Answer 1

270 is the answer if you add

Answer 2

Explanation:

P = 2L + 2W

L = 4w - 30

w = w

P = 2(4w - 30) + 2W

but P = 240

2(4w - 30) + 2w = 240 Remove the brackets.

8w - 60 + 2w = 240 Combine

10w - 60 = 240 Add 60

10w - 60 + 60 = 240+60 Combine

10w = 300 Divide by 10

w = 30

L = 4w - 30

L = 4*30 - 30

L = 120 - 30

L = 90