by tommywallach Wed Jun 19, 2013 8:39 am
Hey Guys,
This isn't a ratios and proportions question. It's a work question.
Rate * Time * # of Workers = Work
Rate * 7 * 20 = 500
rate = 50/14 = 25/7
Now apply that to the second situation:
25/7 * Time * 14 = 200
50 * Time = 200
Time = 4 days
Always important to know what time of question you're tackling, because it informs what technique you use. You wouldn't think of using the rate equation if you didn't know it was a rate question!
-t