Question
Four boys and nine girls can
complete a task in 24 days. Three boys and five girls can finish the same task in 36 days. How many days will it take for six boys and six girls to complete the same task?Solution
ATQ, Let no of boys be 'b' and no of girls be 'g' (4b+9g)24 = (3b+5g)36 (4b+9g)2 = (3b+5g)3 8b+18g = 9b+15g b = 3g 21g × 24 = 24g × number of days taken Number of days taken = 21 days
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