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Time and Work · UPSC CDS/OTA · Question 40 of 105

Time and Work: A cistern has two pipes. One can fill it with water in 8 hours and another can empty it in 5 hours. In how many hours will the cistern be emptied if both the pipes are opened together when ¾ of the cistern is already full of water?

Step-by-step solution. Time and Work for UPSC CDS/OTA.

Topic
Time and Work
Subject
Mathematics
Difficulty
Medium
Solve Time
45-60 sec

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Q · Time and WorkMedium · 45s

A cistern has two pipes. One can fill it with water in 8 hours and another can empty it in 5 hours. In how many hours will the cistern be emptied if both the pipes are opened together when ¾ of the cistern is already full of water?

TopicTime and Work
Question Typemultiple choice
DifficultyMedium
Marking+1 / −0.25
Test Duration30 min

Step-by-Step Solution

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Solution illustration 1
Final Answer: Option A - 6 h
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A cistern has two pipes. One can fill it with water in… - Time and Work (Mathematics) Solved Question