[" 20.Tivo pipes can fill a tank with water in "15" and "12" hours "],[" respectively and a third pipe can empty it in "4" hours.If the "],[" pipes be opened in order at "8,9" and "11:" am respectively,the "],[" tank will be emptied at "]

Two pipes can fill a tank with tank with water in 15 and 12 hours respectively and a third pipe can empty it in 4 hours. If the pipes be opened in order at 8,9 and 11a.m. respectively the tank will be emptied at 11 : 40 adotmdot b. 12 : 40 pdotmdot c. 1: 40 pdotmdot d. 2: 40 pdotmdot

Pipe A can fill a tank in 3 hours, pipe B can fill in 4 hours. and Pipe C can empty in 1 hour. All Three pipes are opened in order, at 3, 4 and 5 pm respectively. The tank will be emptied at?

Two pipes A and B can fill a tank in 12 hours and 16 hours, respectively. While a third pipe C emptied the full tank in 24 hours. If all the three pipes are operate Simultaneously at 7 am. In what time tank will be filled?

Two pipes X and Y can fill a tank in 6 hours and 8 hours respectively while another pipe Z can empty the tank in 4.8 hours. If all the three pipes are opened at the same time, then the time in which the tank can be filled.

Two pipes X and Y can fill a tank in 6 hours and 8 hours respectively while another pipe Z can empty the tank in 4.8 hours. If all the three pipes are opened at the same time, then the time in which the tank can be filled.

Pipes A and B can fill an empty tank in 6 and 8 hours respectively, while pipe C can empty the full tank in 10 hours. If all three pipes are opened together, then the tank will get filled in: