Question

A water tank can be filled by a tap in 8 hours and emptied by an outlet tap in 12 hours. How long will it take to fill the cistern if both inlet and outlet taps are opened together?

LCM OF 8,12 IS 24
Efficiency=3,(-2)

when both , open =3-2=1unit go

so, total time is to fill 4days /1=24
8/2=4. 4muntiply24 also 96hours convert into days is 4 is answer ​

Answer 1

Step-by-step explanation:

An inlet pipe takes 8 hours to fill a tank. An outlet pipe takes 12 hours to empty. ∴ The total time taken is 24 hours

$\:$