Question

10 taps can fill a tank in 45 min. After 15 min. 5 more taps are opened. The total time taken
to fill the tank is
20 min.
2) 25 min
3) 35 min
4) 40 min.
5) None of these​

Answer 1

Answer:

3) 35 minutes

Step-by-step explanation:

In 15 min, 10 taps fill one-third of the tank.

2/3 of the tank is empty.

5 additional taps will reduce total time as follows:

10 taps = 45 min

15 taps = 45/15 × 10 = 30 minutes

15 taps = 30 minutes when completely empty

Time to fill 2/3 of the tank = 2/3 × 30 = 20 minutes.

Total time = 15 + 20 = 35 minutes

I will edit if I find some mistake. Please confirm with someone else as well.

Edit: I have corrected it now.