Pump A can fill a tank of water in 5 hours. Pump B can fill the same tank in 8 hours

Pump A can fill a tank of water in 5 hours. Pump B can fill the same tank in 8 hours

Pump A can fill a tank of water in 5 hours. Pump B can fill the same tank in 8 hours. How long does it take the two pumps working together to fill the tank?(round your answer to the nearest minute).

Answer：3 hours and 5 minutes