need help with word problems

Mathematics
Tutor: None Selected Time limit: 1 Day

An aquarium tank can hold 7700 liters of water. there are two pipes that can be used to fill the tank. the first pipe alone can fill the tank in 44 minutes. the second pipe can fill the tank in 77 minutes by itself. when both pipes are working together, how long does it take them to fill the tank?

Jun 22nd, 2015

Thank you for the opportunity to help you with your question!

1/44-1/77=0.009740

=1hour and 43mins

Please let me know if you need any clarification. I'm always happy to answer your questions.
Jun 22nd, 2015

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Jun 22nd, 2015
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Jun 22nd, 2015
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