Syntel
Company
Numerical Ability
Time and Work
Two pipes A and B can fill tank in 30min and 60 mins respectively. If both pipes are opened together, the time takedn to fill the tank is?
[A] 18 min
[C] 16 min
[B] 11 min
[D] 20 min
Read Solution (Total 4)
-
- work done by (A+B) in 1 hr=1/30+1/60
=9/180
=1/20
so total time= 20 hrs - 11 years agoHelpfull: Yes(5) No(2)
- 1/30+1/60=20 min
- 10 years agoHelpfull: Yes(4) No(0)
- rate of A+B = 1/30+1/60 = 1/20 cis./min. = 20 min./cis.
- 9 years agoHelpfull: Yes(0) No(0)
- A=30min's
B=60 min's
perday work=2,b=1
a+b=3
total work=60 a+b=60/3=20 min's - 9 years agoHelpfull: Yes(0) No(0)
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