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5 votes
One pump can fill a tank of water in 5 hours. A second tank can fill the same tank in 4 hours. If both pumps are used together, how long will it take to fill the tank?

4/5 hours
20/9 hours
9/20 hours
5/4 hours

2 Answers

6 votes

Answer:

4/5 hours

Explanation:

User Oliver Konig
by
5.7k points
4 votes

Answer:

20/9 hours

Explanation:

I got it right on the quiz

User Paulmorriss
by
5.0k points