two pipes A and B fill the the cistern in 22 hrs and 33 hrs respectively.but before filling 7hrs ago pipe b is closed how much total time required for fill tank.
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Answer:
first A
if we will close the pipe in 7 hours
total time required = time taken - time given to fill
22-7 =15 hours
now B
if we will close the pipe in 7 hours
total time required = time taken - time given to fill
again we will you this method
33-7=25 hours
hope it will help you
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