Machine A can put caps on a set of bottles in 8 hours at a constant rate. If Machine A does the job for 6 hours and Machine B does the rest of the job, which works at 1/4 constant rate of Machine A. How long will it take for Machine B alone to do the rest of the job?	Choose one:
A) 4hrs	B) 6hrs	C) 8hrs	D) 10hrs	E) 16hrs
machine A will do 6/8 in 6 hrs, so A does 3/4 of the work ..   Therefore, B will do the remaining 1/4 th work alone..   As the speed of B is 1/4 rate of A, B will do the 1/4th work in same time that A takes to complete full job...   ans 8   8hrs
<result>C</result>
Machine A can put caps on a set of bottles in 8 hours at a constant rate. If Machine A does the job for 6 hours and Machine B does the rest of the job, which works at 1/4 constant rate of Machine A. How long will it take for Machine B alone to do the rest of the job?