Two pipes M and N can fill a tank in 30 and 45 minutes respectively If both the pipes were open for ...........

Quantitative Aptitude ( CCS) Pipes&cistern

Two pipes M and N can fill a tank in 30 and 45 minutes respectively. If both the pipes were open for few minutes after N was closed and the tank was full in 25 minutes, find the time for pipe N was open ?

8.16m

7.5min

5min

10.2m

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Explanation:

Answer & Explanation
Answer – 7.5min
Explanation :
X(1/30+1/45) + 1/30(25-x) = 1
x/45+25/30 =1
x/45 = 5/30 =1/6
x = 45/6
x = 7.5m

By: Sandeep Dubey

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Two pipes M and N can fill a tank in 30 and 45 minutes respectively If both the pipes were open for ...........

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