Question

Swimming pool A is being filled at a rate of 4 inches every 12 minutes. Swimming pool B is being filled at a rate of 7 inches every 18 minutes. What is the difference of the rates at which the pools are being filled in inches per minute ?

Answer 1

So, the difference of the rates at which the pools are being filled is 1/18 inch per minute.

Explanation:

We can find the rate of filling of each pool by dividing the inches filled per hour by the number of minutes it takes to fill them.

Rate of Pool A = 4 inches / 12 minutes = 1/3 inch per minute

Rate of Pool B = 7 inches / 18 minutes = 7/18 inch per minute

The difference in the rates of filling the two pools is:

(7/18) - (1/3) = (7/18) - (6/18) = 1/18 inch per minute.

So, the difference of the rates at which the pools are being filled is 1/18 inch per minute.