An aquarium tank can hold 6600 liters of water. There are two pipes that can be used to fill the tank. The first pipe alone can fill the tank in 66 minutes. The

second pipe can fill the tank in 55 minutes by itself. When both pipes are working together, how long does it take them to fill the tank?

U minutes

X

5

?

Question

Sophie Le

Mathematics

30 March, 23:56

An aquarium tank can hold 6600 liters of water. There are two pipes that can be used to fill the tank. The first pipe alone can fill the tank in 66 minutes. The

second pipe can fill the tank in 55 minutes by itself. When both pipes are working together, how long does it take them to fill the tank?

U minutes

X

5

?

+4

Answers (1)

Know the Answer?

Lailah Garrison · Answer 1

The first pipe operates at rate of (6600 L / 66 min) = 100 L/min.

The second pipe operates at a rate of (6600 L / 55 min) = 120 L/min.

Working together, both pipes operate at a total rate of 220 L/min.

Then the time it takes for both of them to fill the tank is

(6600 L) * (1/220 min/L) = 30 min