Question

A tap is filling a 10-liters tank at the speed of 5 liters per minute.

Answer 1

Answer:

• It takes     2.5 minutes   to fill the tank.

Explanation:

The net speed or net rate for filling the 10-liters tank is equal to the speed the tap is filling less the speed the water is leaking through the hole located at the bottom of the tank:

• Net rate = rate of filling - rate of leaking

• Net rate = 5 liters/minute - 1 liter/minute

• Net rate = 4 liters/minute

Thus, consiedering the tank is empty at the beginning, the time is:

• Time = Volume of the tank / net rate of filling

• Time = 10 liters / (4liters/minute)

• Time = 2.5 minutes ← answer