Q. There are two taps A and B to fill up a water tank. the tank can be filled in 40 minutes if both taps are on. the same tank can be filled in 60 minutes if tape A alone is on. how much time will tap B alone take to fill up the same tank?

• A. 64 min
• B. 80 min
• C. 96 min
• D. 120 min

Correct Answer: D