1) If 4 men or 7 boys can do a work in 29 days, then what time will 12 men and 8 boys take to do the same work? A) 12 days B) 6 days C) 7 days D) 8 days E) 9 days Answer: Option CExplanation:4 men = 7 boys 1 man= 7/4 boys 12 men $=\frac{7}{4}\times12$ = 21 boys (12 men + 8 boys) $=21+8$ = 29 boys 7 boys can do work in 29 days. $\therefore$ 29 boys can do work in $\left(\frac{29\times 7}{29}\right)$ = 7 days
