Q6
Two pipes can fill a tank in 20 and 24 minutes respectively and a waste pipe can empty 3 gallons per minute. All the three pipes working together can fill the tank in 15 minutes. The capacity of the tank is:
A.
60 gallons
B.
100 gallons
C.
120 gallons
AnswerD.
180 gallons
E.
None of these
Answer: Option C
Solution
Answer: Option C
Solution:
Work done by the waste pipe in 1 minute