2 men and 7 boys can do a piece of work in 14 days; 3 men and 8 boys can do the same in 11 days. Then, 8 men and 6 boys can do three times the amount of this work in ?
Solution
Correct Answer: Option B
Solution: 11 boys can do the work in = 14 days
So, 1 boy can do it in = 14 \( \times \) 11 days
Then 22 boys can do it in = 14 \( \times \) 11/ 22 = 7 days
Hence, the required number of days to do thrice the work is = 7\( \times \) 3 = 21
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