Q24
Two pipe A and B can fill a water tank in 20 and 24 minutes respectively and a third pipe C can empty at the rate of 3 gallons per minute. If A, B and C are open together to fill the tank in 15 minutes, find the capacity of tank?
A.
180 gallons
B.
150 gallons
C.
120 gallons
AnswerD.
60 gallons
Answer: Option C
Solution
Answer: Option C
Solution:
Work done by the C pipe in 1 minute∴ Volume of part = 3 gallons.
Volume of whole = (3 × 40) gallons = 120 gallons.