Aptitude Test Series

Q.  Two pipes A and B can fill a cistern in 37.5 minutes and 45 minutes respectively. This cistern will be filled in half an hour if both the pipes are opened together initially and pipe B is then turned off after X minutes. What is X?

a. 10 minutes
b. 15 minutes
c. 12 minutes
d. 9 minutes


ANSWER: See Answer
 
No explanation is available for this question!
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