Math 8th grade

Question

A rectangular swimming pool is twice as long as it is wide. A small concrete walkway surrounds the pool. The walkway is a constant 2 feet wide and has an area of 196 square feet. Find the dimensions of the pool.

Answer 1

Draw and label a diagram - it should look like a rectangular doughnut!

 

A_{pool and walk} - A_pool = A_walk

 

(2w + 4)(w + 4) - 2w² = 196

 

Can you solve for w and answer?