Question

2. Two pipes A and B can fill a tank in
40 min and 60 min respectively. If
pipe A opened and after 20 minutes
pipe B also opened, the time taken to
fill the tank from the start is:
O
32 minutes
64 minutes
O 31 minutes
29 minutes

Answer 1

The answer is

32 minute

because a will fill the tank harf and b can take time of 32 minutes