3. Two taps A and B can fill an overhead tank in 10 hours and 15 hours respectively Be
the tans are opened for 4 hours and then B is turned off. How much time will A take to
fill the remaining tank?
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Answer:
3hr 20mins
Step-by-step explanation:
total work is 30 units
A+B do this in 6hr (30/5=6)
A and B are open 4hr it's fill 20unit
remaining 10 untis A will do in 3hr 20 min
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