Two pipes A and B can fill a tank is 8 minutes and 14 minutes respectively. If both the pipes are opened simultaneously, and the pipe A is closed after 3 minutes, then how much more time will it take to fill the tank by pipe B?
Pick:
A) 5 minute 25 second  B) 5 minute 45 second  C) 5 minute 35 second  D) 6 minute 45 second  E) 7 minute 45 second
Part filled by pipe A in 1 minute =1/8   Part filled by pipe B in 1 minute =1/14   Part filled by pipe A and pipe B in 1 minute =1/8+1/14=11/56   Pipe A and B were open for 3 minutes.   Part filled by pipe A and 5 minute 45 second in 3 minute=3 Ã— 11/56=33/56   Remaining part =1-33/56=23/56   Time taken by pipe 5 minute 45 second to fill this remaining part=(23/56)/(1/14)=23/4   =5 3/4 minutes   =5 minute 45 second   Answer is 5 minute 45 second
<result>B</result>
Two pipes A and B can fill a tank is 8 minutes and 14 minutes respectively. If both the pipes are opened simultaneously, and the pipe A is closed after 3 minutes, then how much more time will it take to fill the tank by pipe B?