Question

Tap a fills a tank in 3 hours outlet pipe B and C can empty the tank in 4 hours in 6 hours respectively if the tank is empty and A and B are turn on how long will it take to fill up after the tank is full A B and C are turned on how long it will take to be empty

Answer 1

Answer:

12 Hrs to fill

12 Hrs to empty

Step-by-step explanation:

3A = T

4B = T

6C = T

A & B in 1 Hr =  T/3 - T/4 =  T/12

T/12 is filled by A&B together in  1 hr

T will be filled in  12 Hr

A&B&C together for empty  in 1 hr =  T/4 + T/6 - T/3 =  (T/12)(3+2-4)= T/12

so another 12 hrs to empty tank