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RRB Group-D 28th Sep 2018-shift -1 Question 9

Question 9

One of the two inlet pipes works twice as efficiently as the other. The two, working alongside a drain pipe that can empty a cistern all by itself in 12 hours, can fill the empty cistern in 12 hours. How many hours will the less efficient inlet pipe take to fill the empty cistern by itself?



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Comments
Gururaj

3 years, 11 months ago

solution please

riya sen

4 years ago

Solve it

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