RRB NTPC · Question 13

A flask has two holes. The 1^st hole alone makes the flask empty in 9 minutes and 2^nd hole alone makes the flask empty in 16 minutes. If water leaks out at constant rate, how long in minutes does it take if both the holes together empty the flask? A. \(\frac{{19}}{{25}}\) B. \(4\frac{{19}}{{25}}\) C. \(5\frac{{20}}{{25}}\) D. \(5\frac{{19}}{{25}}\)

1. A

   C

2. B

   B

3. C

   A

4. D

   D