Question

three pipes fill the tank in 7 hrs.if 2 of themtake 14 hours,21 hours.Each to fill the tank .how many hours will the third pipe take to fill the tank​

Answer 1

A,B,C together fill the tank in 6 hours. Therefore, in 2 hours, these three pipes together fills 13 of the tank. Therefore, A,B together fills remaining 23 of the tank in 7 hours. i.e., A,B together can fill the entire tank in 7×32=10.5 7 × 3 2 = 10.5 hours.

Answer 2

Step-by-step explanation:

A,B,C together fill the tank in 6 hours. Therefore, in 2 hours, these three pipes together fills 13 of the tank. Therefore, A,B together fills remaining 23 of the tank in 7 hours. i.e., A,B together can fill the entire tank in 7×32=10.5 7 × 3 2 = 10.5 hours