Question

A tap fills a tank in 8 hour. another tap empties the full tank in 12 hours. how long will it take to fill the tank, if the tank is empty and both the taps are open

Answer 1

Heya

∆ Tap A one hour work is : ( 1 / 8 )

∆ Tap B one hour work is : -( 1 / 12 )

=> Taps ( A + B ) one hour work is : ( 1 / 24 )

=> Time taken to fill the tank is : 24 hours