Question

A tank that holds up 10 gallons. when its active, a drain empties water from the tank at a constant rate, when Jada first see the tank, it contains 7 gallons of water. three minute later the tank contains five gallons of water.

At what constant/rate is the amount of water changing in the tank?

Answer 1

-2/3 gallon/minute

Explanation:

In three minutes the water volume has decreased by 2 gallons (7 less 5 is 2). The unit rate of decrease of the amount of water in the tank is thus:

- 2 gallons

------------------- = -2/3 gallon/minute

3 minutes