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76
Q:

A water tank is two-fifth full.Pipe A can fill a tank in 10 minutes and pipe B can empty it in 6 minutes.If both the pipes are open,how long will it take to empty or fill the tank completely?

A) 6 min.to empty B) 6 min.to fill
C) 9 min.to empty D) 9 min.to fill

Answer:   A) 6 min.to empty



Explanation:

Clearly,pipe B is faster than pipe A and so,the tank will be emptied.

 

part to be emptied = 2/5

 

part emptied by (A+B) in 1 minute=16-110=115

 

115:25::1:x

 

25*15=6mins

 

so, the tank will be emptied in 6 min

Subject: Pipes and Cistern - Quantitative Aptitude - Arithmetic Ability
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A sump is filled by three tankers with uniform flow. The first two tankers operating simultaneously fill the sump in the same time during which the sump is filled by the third tanker alone. The second tanker fills the sump 5 hours faster than the first tanker and 4 hours slower than the third tanker. The time required by the first tanker is:

 

A) 16hours B) 9hours
C) 10hours D) 15hours
 
Answer & Explanation Answer: D) 15hours

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Answer & Explanation Answer: A) 6/11

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A tap can fill a tank in 50 minutes. If the tank has a leakage which alone is capable of emptying the tank in 2.5 hours, the tank will now be filled in

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A tap can fill a tank in 20 minutes. If a leakage is capable of emptying the tank in 60 minutes, the tank will be filled in

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Raghu's tanker can fill a cistern in 4 hours. After half the cistern is filled, three more similar tankers are opened. What is the total time taken to fillthe cistern completely?

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A water tank has two holes. The 1st hole alone makes the tank empty in 3 min and 2nd hole alone makes the tank empty in 5 min. If water leaks out at a constant rate, how long in minutes does it take if both the holes together empty the tank?

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Answer & Explanation Answer: D) 15/8

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