Pipe A can fill a pool in 12 hours at a constant rate. If Pipe A does the job for 8 hours and Pipe B does the rest of the job, which works at 1/3 constant rate of Pipe A. How long will it take for Pipe B alone to do the rest of the job?	Select the correct option:  A) 12hrs  B) 6hrs  C) 8hrs  D) 10hrs  E) 24hrs
Pipe A will do 8/12 in 8 hrs, so A does 2/3 of the work ..   Therefore, B will do the remaining 1/3 rd work alone..   As the speed of B is 1/3 rate of A, B will do the 1/3rd work in same time that A takes to complete full job...   ans 12   12hrs
<result>A</result>
Pipe A can fill a pool in 12 hours at a constant rate. If Pipe A does the job for 8 hours and Pipe B does the rest of the job, which works at 1/3 constant rate of Pipe A. How long will it take for Pipe B alone to do the rest of the job?