# How Much Time will be Needed to Empty The Tank? If

Answered

A tap can empty a tank i 30 minutes. A second tap can empty it in 45 minutes. If both taps operate simultaneously, how much time is needed to empty the tank?

- 14 minutes
- 15 minutes
- 30 minutes
- 18 minutes

Best answer

**Answer: (4) 18 minutes**

**Explanation:-**

A tap can empty a tank = 30 minutes

Then, A tap can empty a tank in a minute = 1/30

A second tap can empty it = 45 minutes

Then, second tap can empty in a minute = 1/45

Both taps can empty the tank = 1/ 30 + 1/45

= (3 + 2) /90

= 5/90

= 1/18

Then, both tapes can empty the tank = 18 minutes.

Hence, the answer is (4) 18 minutes.