Question

A tank is filled in 5 hours by three pipes A, B and C. The pipe C is twice as fast as B and B is twice as fast as A. How much time will pipe A alone take to fill the tank?

Answer 1

5/7 hrs ie 5/7*60 minutes

Answer 2

♠Answer♠

Let The Time Taken By The Fastest tap i.e. C be 'x'

So , A + B + C = 5 hour

A + 2C + C = 5

4x + 2x + x = 5

7 x = 5

x = 5/7 Hr

And , As A takes 4x time ,

Time taken by A = 20/7 Hr

#SupermanINFINITY