RRB Assistant Loco Pilot and Technician Model Paper 16 with key

Question : 54 of 75

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A cistern has two pipes. One can fill it with water in 8 hours and other can empty it in 5 hours. In how many hours will the cistern be emptied if both the pipes are opened together when 3/4 of the cistern is already full of water?

13 1/3 hours
10 hours
6 hours
3 1/5 hours

Validate

Solution:

40 × h = 30
⇒ ⇒

{30}/3

= 10 hrs

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