Question

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.​

Answer 1

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

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Step-by-step explanation: