Two pipes A and B can fill a tank in 24 and 48 minutes respectively. If both the pipes are used together, then how long will it take to fill the tank?	Choose the correct choice from the following answers:
A) 12 B) 16 C) 19 D) 20 E) 22
Part filled by A in 1 min. = 1/24   Part filled by B in 1 min. = 1/48   part filled by (A + B) in 1 min. = 1/24 + 1/48 = 1/16.   Both the pipes can fill the tank in 16 minutes.   Answer: 16
<result>B</result>
Two pipes A and B can fill a tank in 24 and 48 minutes respectively. If both the pipes are used together, then how long will it take to fill the tank?