Three taps P, Q and R can fill a tank in 12 hrs, 15 hrs and 20 hrs respectively. If P is open all the time and Q and R are open for one hour each alternately, starting with Q, then the tank will be full in how many hours

Comments and Answers (2)

Rashmi

Rashmi

how did the answer came

Archana

Archana

please anyone explain this answer

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