PipeA can fill a tank in 5 hours and pipe B in 10 hours both the pipes are opened together and after 2 hours pipe A is closed how much time will be taken by pipe B to fill the remaining tank?
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A can fill the tank in 1 hour=1/5
B. ....…............................ =1/10
A & B together can fill in 2 hours =2(1/5+1/10)=3/5.
The remaining 2/5 can be filled by B only is 10(2/5)=4 hours
B. ....…............................ =1/10
A & B together can fill in 2 hours =2(1/5+1/10)=3/5.
The remaining 2/5 can be filled by B only is 10(2/5)=4 hours
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