Question

A pipe P is 6 times faster than second pipe Q and takes 40 min less than pipe Q to fill a tank. How long will it take to fill the tank, when both the pipes are used simultaneously?​

Answer 1

Answer:

Step-by-step explanation:

et pipe A takes p min to fill

Then,

pipe B takes 3p min to fill

=> 3p - p = 32

=> p = 16 min => 3p = 48 min

 

Required, both pipes to fill = (48 x 16)/(48 + 16) min = 12 min.