general math MCQ #842

Two taps X and Y can fill a tank in 10 hrs. and 15 hrs.respectively. If the both taps are opened together, the tank will be full in_________?

general math MCQ #842

  1. Question 1

    Q1. Two taps X and Y can fill a tank in 10 hrs. and 15 hrs.respectively. If the both taps are opened together, the tank will be full in_________?

    • A) 3 hrs.
    • B) 4 hrs,
    • C) 5 hrs.
    • D) 6 hrs.

    Answer: 6 hrs.

    Explanation: Combined fill rate = 1/10 + 1/15 = 1/6 per hour, so the tank fills in 6 hours.