Question

A pool is draining at a constant rate. Five minutes ago, the pool had 180 gallons of water in the pool. Now there is 120 gallons of water remaining in the pool. If the pool can hold 270 gallons of water, how many minutes ago was the pool Full

Answer 1

12 and a half minutes ago

Explanation:

In five minutes, the pool drained 180-120=60 gallons of water. This means that the pool loses 60/5=12 gallons of water per minute.

You can make the equation 270-12x=120, where x is the amount of minutes passed.

Subtract 270 on both sides to get -12x=-150

Divide both sides by -12

x=150/12 which is 12.5

Therefore, x=12.5 or 12 and a half minutes ago