mdcf wrote:
Why does setting up a proportion lead you to the wrong answer?
(70 workers/3 hours) = (30 workers/X hours)
Hi
mdcf70 workers take 3 hours - Work done is 210 worker hours
30 workers take X hours - Work done is 30X worker hours
Here, we can equate the work done by 70 machines and 30 machines, 30X = 210
Solving for X, we get X = \(\frac{210}{30} = 7\)
What you were trying to equate was the work done in an hour(which is not the same)
Hope this helps you!
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