A family of 6 people is marooned on an Island, and has enough food for 30 days. After ten days,
two men drowned. How long after this unhappy event would the remaining food last the
remaining people?
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Total food = 30(day) × 6(people) = 180
10 day use food = 10 × 6 = 60
remaining food. = 180 - 60 =120
2 man are drowned left people = 6 - 4 =4
use remaining food in day = 120÷4 = 30
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