Free Practice Question
PS · Problem Solving
655-705
Work Rate Problems
Two pumps are utilized to fill a water tank that is currently empty. The first pump has the capability to fill the tank in 30 hours, while the second pump operates at 3/4 the speed of the first pump. Initially, the first pump works alone for 10 hours, after which the second pump is introduced to finish filling the tank. What is the total time taken to fill the tank?
Answer Choices
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11 hours and 30 minutes
B
12 hours
C
13 hours and 20 minutes
D
20 hours and 30 minutes
E
21 hours and 25 minutes
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Explanation
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Difficulty
655-705
Type
PS
Category