First pipe can fill a tank in 12 Second pipe can fill the same tank in 6 hours

First pipe can fill a tank in 12 Second pipe can fill the same tank in 6 hours. Third pipe in  4 hours. How  long will it take  to fill the  tank if  all the  3 pipes  are opened simultaneously?

  1. 2 hrs
  2. 3 hrs.
  3. 4 hrs.
  4. 12 hrs.
Anurag Mishra Professor Asked on 26th January 2016 in Maths.
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1 Answer(s)

Answer: (1) 2 hrs 

Anurag Mishra Professor Answered on 26th January 2016.
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