RRB NTPC · Question 23

A water tank has two holes. The 1^st hole alone empties the tank in 9 minutes and 2^nd hole alone empties the tank in 6 minutes. If water leaks out at a constant rate, how many minutes does it take if both the holes together empty the tank?

1. A

   \(3\frac{3}{5}\)

2. B

   3/5

3. C

   \(3\frac{1}{5}\)

4. D

   \(3\frac{2}{5}\)