Challenge:
If 5 workers can build 2 houses in 24 days, then how many days would it take 24 workers to build 10 houses?
A- 10
B- 22
C- 24
D- 25
E- 60
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The correct answer is D.
If 5 workers can build 2 houses in 24 days, they can make 1 house in 12 days. Therefore, each worker can make one house in 60 days. (5 × 12 = 60)
One worker can make 10 houses in 600 days. Therefore, 24 workers can make 10 houses in 25 days. (600 ÷ 24 = 25)
Reza is an experienced Math instructor and a test-prep expert who has been tutoring students since 2008. He has helped many students raise their standardized test scores--and attend the colleges of their dreams. He works with students individually and in group settings, he tutors both live and online Math courses and the Math portion of standardized tests. He provides an individualized custom learning plan and the personalized attention that makes a difference in how students view math.
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