Pipe P can fill a tank in 3 hours, pipe Q in 9 hours and pipe R in 18 hours.
Pipe P can fill a tank in 3 hours, pipe Q in 9 hours and pipe R in 18 hours. If all the pipes are open, in how many hours will the tank be filled?
Answer/Solution
2 hours
Steps/Work
Explanation:
Part filled by (P + Q + R) in 1 hour = (1/3 + 1/9 + 1/18) = 1/2
All the three pipes together will fill the tank = 2/1 = 2 hours
ANSWER A
Part filled by (P + Q + R) in 1 hour = (1/3 + 1/9 + 1/18) = 1/2
All the three pipes together will fill the tank = 2/1 = 2 hours
ANSWER A