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:

Answer 1

Answer:

20min is this right if right mark brainlist if incorrect follow me and send solution I follow back you ok

Answer 2

Answer:

27 min

Step-by-step explanation:

first find parts fill in 1 min

A can fill 1/40 part in 1 min

B can fill 1/60 part in 1min

they both together can fill 1/14 in 1 min

so first 20 min A had filled 1/2 part

remaining 1/2 part is filled by both in 7 min