SOLUTION: Five workers can do 7 jobs in 3 days. How many days will it take 10 workers to do 14 jobs?
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Question 66497This question is from textbook Advanced mathematics
: Five workers can do 7 jobs in 3 days. How many days will it take 10 workers to do 14 jobs?
This question is from textbook Advanced mathematics
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
Five workers can do 7 jobs in 3 days. How many days will it take 10 workers to do 14 jobs?
:
Can we look at it this way? It takes (5*3) = 15 man/days to do 7 jobs
:
Let x = number of days to do 14 jobs; 10x man/days to do 14 jobs
:
=
:
Cross multiply:
7(10x) = 15*14
70x = 210
x = 210/70
x = 3 days
:
10 men for 3 days = 30 man/days
:
Check, using man/days per job: 15/7 = 2.142857 per job
14 jobs would require: 2.142857*14 = 30 man/days
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