If two pipes function simultaneously, the reservoir will be filled in 12 days.One pipe fills the reservoir 10 hours faster than the other. How many hours does it take the second pipe to fill the reservoir.	Choose the correct choice from the following
A) 53 hours
B) 13 hours
C) 30 hours
D) 43 hours
E) 45 hours
If two pipes function simultaneously, the reservoir will be filled in 12 hours ( not days).One pipe fills the reservoir 10 hours faster than the other. How many hours does it take the second pipe to fill the reservoir.   Then one pipe will fill tank in 20 hrs and second in 30 hrs when opened alone.   ANSWER:30 hours
<result>C</result>
If two pipes function simultaneously, the reservoir will be filled in 12 days.One pipe fills the reservoir 10 hours faster than the other. How many hours does it take the second pipe to fill the reservoir.