Syntel
Company
Numerical Ability
Pipes and Cistern
There are 3 pipes A, B and C that when opened simultaneously would fill a tank in 20 minutes. C can fill the tank
twice as fast as A which in turn would fill the tank twice as fast as B. How long will it take for B alone to
fill the tank?
Read Solution (Total 1)
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- If b is the time ( in minutes) taken by pipe B to fill the tank.
Then 1/b tank is filled by B in 1 minute
2/b tank is filled by A in 1 min
4/b tank is filled by c in 1 min.
1/b + 2/b+ 4/b tank is filled by 3 pipes in 1 min.
as per given condition,
1/b + 2/b+ 4/b = 1/20
7/b = 1/20
b=140
so pipe B alone can fill tank in 140 hrs.
- 13 years agoHelpfull: Yes(0) No(0)
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