Question

A rectangular front porch has a perimeter of 30 feet. Its area is 50 square feet. What are the dimensions of the porch?

Answer 1

5 ft x 10 ft

Explanation:

2w+2l=30

lw=50

l=50/w

2w+2(50/w)=30

2w+100/w=30

2w^2+100=30w

2w^2-30w+100=0

w=5, 10

Therefore, the dimensions are 5x10