A Pipe Full the tank in 6 hrs. B Pipe full the tank in 15 hrs. But tank have a small leak that will empty in 15 hrs How much time taken to Full in that tank?

• 1/6+1/15-1/15=1/6 6hrs
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• 1/6+1/15-1/15=1/6
  so time take to fill that tank is 6 hrs
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• leakage will cancel the effect of pipe B,so it will take as much time as taken by PIPE A
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• why are you putting your maths mind here. work done by pipe B and leakage is zero. means only pipe A do the whole work.
  ANS. is 6 hrs.
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