Question

9 pipes are required to fill a tank in 2 hours. How long will it take if 3 more pipes are used to fill the same tank? ​

Answer 1

Time required to fill the tank with 9 pipes= 2hrs

Time required to fill the tank with 1 pipe= ( 2x9)hrs

Time required to fill the tank with 3 pipes= (2x9)/3 hrs= 18/3 hrs= 6hrs