8. Tap A and tap B can together fill an empty cistern in 6 hours. Tap A alone can fill the cistern
in 10 hours. Find the time taken by tap B alone to fill the cistern.
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Answer:
om
Step-by-step explanation:
Time taken by tap A to fill the cistern =4hours.
Work done by tap A in 1 hour =41
Time taken by tap B to empty the full cistern =6hours.
Work done by tap B in 1 hour =−61 (since, tap B empties the cistern).
Work done by (A+B) in 1 hour 41−161=123−2=121 part of the tank is filled.
Therefore, the tank will fill the cistern =12hours.
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