Question

.First pipe can fill a tank in 30 minutes. Second pipe can fill the same tank in 60 minutes. A third pipe can empty the same tank if it is full in 45 minutes. If the tank is empty and all three pipes are open in how many minutes will the tank fill?​

Answer 1

Answer:

idk :(

Step-by-step explanation:r u having exam?

Answer 2

Answer:

36 min

Step-by-step explanation:

total work = efficiency * time

Take LCM for (30,60,45)

           Time            efficiency

A           30                   6

B           60                   3

C           45                   4

Efficiency =  (A+B+C)=  (6+3--4)= 5

Time,

=180/5 =36 minutes