A and B rent a pasture for 10 months. A put in 80 cows for 7 months. How many can B put in for the remaining 3 months, if he pays half as much again as A?
Correct answer: D. 280
- A. 120
- B. 180
- C. 200
- D. 280
Explanation
A contributes 80 cows x 7 months = 560 cow-months. B must contribute one and a half times this amount, or 560 cow-months x 3/2 = 840 cow-months, and over 3 months this requires 840 cow-months / 3 months = 280 cows. The likely mistake is option c, 200 cows, which does not apply the stated one-and-a-half-times payment.
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