It was calculated that 75 men could complete a piece of work in 20 days. When…
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It was calculated that 75 men could complete a piece of work in 20 days. When work was scheduled to commence, it was found necessary to send 25 men to another project. How long it will take to complete the work?
Answer: C. 30 — Solution: 3 Amount of work = 75 × 20 = 1500 man-days 25 men are sent away, so men left = 75 – 25 = 50 Hence, days taken to finish work = 1500 ÷ 50 = 30 days
- A.
35
- B.
25
- C.
30
- D.
45
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Correct answer: C
Solution: 3
Amount of work = 75 × 20 = 1500 man-days
25 men are sent away, so men left = 75 – 25 = 50
Hence, days taken to finish work = 1500 ÷ 50 = 30 days
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