If 5 men take an hour to dig a ditch, then how long should 12 men take a dig…
2023
If 5 men take an hour to dig a ditch, then how long should 12 men take a dig to the ditch of the same type?
Answer: A. 25 min — Answer: 25 min Key idea: When the total amount of work is fixed, the product of the number of workers and the time they work is constant. Compute total work…
- A.
25 min
- B.
30 min
- C.
28 min
- D.
20 min
Attempted by 85 students.
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Correct answer: A
Answer: 25 min
Key idea: When the total amount of work is fixed, the product of the number of workers and the time they work is constant.
Compute total work in man-minutes using the given data: 5 men × 60 minutes = 300 man-minutes.
Divide total man-minutes by 12 men to find the time: 300 ÷ 12 = 25 minutes.
Therefore, 12 men will take 25 minutes to dig the same ditch.
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