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RE: Be the First to Solve this Math Test and Win an 100% upvote worth $0.4 Instantly #15

in #maths3 years ago

If 7 workers can make 210 pairs of cup in 6 days, then 1 worker makes (210 / 7 / 6) = 5 pairs of cup in 1 day.
Let X be the number of workers we are looking for. These workers make 450 pairs of cup in 10 days:
X * 5 * 10 = 450
It follows that X is 9.