Pipe A can fill a tank in 4 hours, pipe B in 8 hours and pipe C in 24 hours. If all the pipes are open,in how many hours will the tank be filled ? Choose the most appropriate option
A) 2.4 B) 2.6 C) 3.4 D) 2.5 E) 3
1/4+1/8+1/24=10/24=1/2.4. so 2.4 hrs   2.4NSWER:2.4
<result>A</result>
Pipe A can fill a tank in 4 hours, pipe B in 8 hours and pipe C in 24 hours. If all the pipes are open,in how many hours will the tank be filled ?