7. If 12 men and 16 boys can do a piece of work in 5 days and 13 men and 24 boys can do it in 4 days, compare the daily work done by a man with that done by a boy. (a) 1:2 (b) 1:3 (c) 2:1 (d) 3:1
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i think (a) is a correct answer
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