Question

Pipe a can fill a tank 2 times faster than pipe

b.if pipe a and b together fill a pipe in 24 minute then in how many minute b alone fill a tank

Answer 1

Pipe A can fill the tank 2 times faster than pipe B
Let Pipe A fill the tank in X minutes
Then Pipe B fill the tank in 2X minutes
Pipe A & B together fill the tank in 24 minutes.

In 1 minute,
Pipe A fills = 1/X part
Pipe B fills = 1/2X part
Pipe A & B fills = 1/24 part
1/24 = 1/X + 1/2X
1/24 = 2+1/2X = 3/2X
X = 36 minutes
2X = 72 minutes
Hence, pipe B can fill the tank alone in 72 minutes.
Hope it helps.