Question

3. 4 men or 7 boys can do a work in 29 days. Then 12 men and 8 boys can complete the same work in how many days?
(a) 6 days (b) 7 days (c) 8 days (d) 9 days​

Answer 1

Answer:

8 days more they will need

Answer 2

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4 men = 7 boys

1 man = 7/4 boys

12 men = 12×(7/4) = 21 boys

12 men + 8 boys = 21+8=29 boys

7 boys = 29 days

29 boys = (7 × 29)/29=7 days