Engineering Board Exam Reviewer · Work Problems · easy
If 15 students can build a railway prototype 108 m long in 6 days, what length of similar railway can be built by 25 students in 3 days?
- 50 m
- 75 m
- 80 m
- 90 m
Answer
D. 90 m
Solution
By direct proportion: 15(6)/108 = 25(3)/x, giving x=90 m.
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