SOLUTION: One crew can put up holiday decorations in the mall in 8 hours. If a slower crew can put up the decorations in 10 hours, how long will it take if both crews work together?
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-> SOLUTION: One crew can put up holiday decorations in the mall in 8 hours. If a slower crew can put up the decorations in 10 hours, how long will it take if both crews work together?
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Question 1192446: One crew can put up holiday decorations in the mall in 8 hours. If a slower crew can put up the decorations in 10 hours, how long will it take if both crews work together? Found 2 solutions by Alan3354, ikleyn:Answer by Alan3354(69443) (Show Source):
You can put this solution on YOUR website! One crew can put up holiday decorations in the mall in 8 hours. If a slower crew can put up the decorations in 10 hours, how long will it take if both crews work together?
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both work together?
What if only one of them works together?
Rate of work of the first crew is of the job per hour;
rate of work of another crew is of the job per hour
and the combined rate of work is the sum = = = of the job per hour.
It means that the entire job will be completed by the two crews in hours = 4 hours = 4 hours, 26 minutes and 40 seconds. ANSWER
Solved.
On the way, from my post you learned three important things:
(1) what is the rate of work;
(2) that the combined rate of work is the sum of individual rates;
(3) and how to use the gained knowledge to solve this one and many other similar problems.
