Two pipe A and B fill a tank in 6 hours and 8 hours respectively.and C empty that tank in 12 hour.if all three pipe open together in empty tank then how much time it take to fill the tank?  Choose the correct choice from the following choices:
A) 19/3	B) 23/2	C) 24/5	D) 18	E) 16
all three pipe resultant fill tank in 1 hour=[1/6+1/8-1/12]=5/24   total time taken to fill tank=24/5 hour   answer 24/5
<result>C</result>
Two pipe A and B fill a tank in 6 hours and 8 hours respectively.and C empty that tank in 12 hour.if all three pipe open together in empty tank then how much time it take to fill the tank?