Directions: The following question is based on three statements labeled I, II, and III. Determine whether the information provided in the statements is sufficient to answer the question.
Question: A tank is connected to two inlet pipes (X and Z) and one outlet pipe (Y). The pipes work at different efficiencies to fill or empty the tank. Pipes X and Y together can fill the tank in 60 minutes.
Find the time taken by pipe Y alone to empty a fully filled tank.
Statements:
I) The ratio of the efficiencies of pipes X and Z is 1:2.
II) The time taken by pipe Y alone to empty the tank is 20 minutes more than the time taken by pipe Z alone to fill the tank.
III) All three pipes working together can fill the tank in (60/7) minutes.
1
Only Statement III alone is sufficient to answer the question.
2
Only Statement I alone is sufficient to answer the question.
3
Any two statements together are sufficient to answer the question.
4
Only Statement II alone is sufficient to answer the question.
5
Both (1) and (3)