90 persons consume 810 kg of food in 27 days. In how many days will 60 persons consume 300 kg of food?
A12 days
B13 days
C15 days ✓ Correct
D18 days
Correct answer: (C) 15 days
Explanation
It takes 15 days.
810 kg needs 90 x 27 = 2430 person-days, so 810/2430 = 1/3 kg per person-day.
For 300 kg with 60 persons: 300 = 60 x D x (1/3).
300 = 20 x D.
D = 15 days.
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