A machine puts c caps on bottles in m minutes. How many E hours will it take to put caps on b bottles?  Select the correct option:
A) 60bm/c
B) E=bm/60c
C) bc/60m
D) 60b/cm
E) b/60cm
The machine puts c caps in m minutes or c caps in m/60 hours.   Rate = c/m/60 = 60c/m.   To put b caps the machine will take:-   Time = Work/Rate   T = b/60c/m = bm/60c   Answer is E=bm/60c.
<result>B</result>
A machine puts c caps on bottles in m minutes. How many E hours will it take to put caps on b bottles?