Question

A tank can be filled by one pipe in four hours and by a second pipe in six hours; and when it is full, the tank can be drained by a third pipe in three hours. If the tank is empty and all three pipes are open, in how many hours will the tank be filled?



8 hours

12 hours

24 hours



are the the first and second pipe going at the same time ?????

Answer 1

12

Answer 2

can you awsner my question at the bottom

Answer 3

No. Gimmie medal

Answer 4

know you didnt help me in any way so no

Answer 5

no*

Answer 6

Both pipes are going st the same time.

Answer 7

let v be the volume of tank,then
in1 hr tank is full=
\[\frac{ V }{ 4 }+\frac{ V }{ 6 }-\frac{ V }{ 3 }\]
Calculate V

Answer 8

how do i get v ?

Answer 9

does one pipe fill up the tank in four hour while the other pipe goes for six hours .....do they fill up the tank as an addittive

Answer 10

in 1 hr tank is full=\[V \frac{ 3+2-4 }{ 12 }=\frac{ V }{ 12 }\]
OR Tank is full in hours=1*12=12hs

Answer 11

we can say one 1/12 th part is full in hrs=1
tank is full in hrs=1*12/1=12 hrs.