If 4 men reap 40 acres in 30 days, how many acres will 18 men reap in 12 days?

2023

If 4 men reap 40 acres in 30 days, how many acres will 18 men reap in 12 days?

  1. A.

    72 acres

  2. B.

    72.5 acres

  3. C.

    72.8 acres

  4. D.

    72.5 acres

Attempted by 33 students.

Show answer & explanation

Correct answer: A

Solution: Use man-days to relate men, days, and acres.

  1. Total man-days to reap 40 acres = 4 men × 30 days = 120 man-days.

  2. Man-days required per acre = 120 man-days ÷ 40 acres = 3 man-days per acre.

  3. Available man-days with 18 men for 12 days = 18 × 12 = 216 man-days.

  4. Acres reaped = 216 man-days ÷ 3 man-days per acre = 72 acres.

Answer: 72 acres.

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