1.

Pipes A and B, when working together can fill an empty tank in 24 hours. They work together for 8 hours and then B is stopped but A continued to work. It took a total of 28 hours to fill the tank. How long would it take A to fill the empty tank alone?

A. 30 hours
B. 29 hours
C. 28 hours
D. 31 hours
Answer» B. 29 hours


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