Question

A tap can fill a tank in 35 minutes and another can empty it in 70 minutes. If both are
opened simultaneously when will the tank be filled? *
0
60 min
O 70 min
O
50 min
O 80 min​

Answer 1

Answer:

First tap fill tank 2 times in 70 minutes, but second tap empty one tank in 70 minutes.

So tank filled one time in 70 minutes

Hence , option (b) 70 minutes is right answer