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A water filling Pipe P is 5 times faster than second Pipe Q. If P fills a cistern in 30 minutes. How long will it take to fill the tank, when both the pipes are kept in operation simultaneous?
- A27 min
- B26 min
- C28 min
- D25 min
Answer not set
Discussion 1
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CCommunity
Given,
⇒ P = 5Q
Pipe P 1 minute work = 1/30
Pipe Q’s 1 minute work = 1 /150
If both pipes open,
Pipe (P + Q)’s 1 minute work = 1/30 + 1/150
= 6/150
= 1/25
∴ It will take 25 minute to fill the tank.
⇒ P = 5Q
Pipe P 1 minute work = 1/30
Pipe Q’s 1 minute work = 1 /150
If both pipes open,
Pipe (P + Q)’s 1 minute work = 1/30 + 1/150
= 6/150
= 1/25
∴ It will take 25 minute to fill the tank.