Question

Tap A can fill a water tank in 10 hours while Tap B can fill it in 15hours In how much time will the water tank be filled if both A and B are opened together​

Answer 1

Answer:

30 hours

Step-by-step explanation:

Tap A can fill the tank in 10 hours. Tap B can empty the tank in 15 hours. So the tank can be completely filled in = (10 × 15)/(15 – 10) = 150/5 = 30 hours. So 2/3 rd of the tank can be filled in = 30 × 2/3 = 20 hours.