A and B working saperately can do a piece of work in 12 and 18 hours respectively. If they work for 6 hour alternately with B beginning, in how many hours will the work be completed?
A and B working saperately can do a piece of work in 12 and 18 hours respectively. If they work for 6 hour alternately with B beginning, in how many hours will the work be completed?
A). 9 hours
B). 15 hours
C). 13 ½ hours
D). 12 ½ hours
1 answers
Answered by
Guest on
2021-07-09 12:38:01 | Votes
0 |
# 15 hours
A and B 2 hours work = 1/12 + 1/18 = 5/36
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