Question

If $3$ men or $6$ boys can finish a work in $20$ days , then how long will $4$ men and $12$ boys take to finish the same work ?

• A. $2$ days
• B. $4$ days
• C. $6$ days
• D. $8$ days

Answer 1

Answer: (C)

$6$ days

$3$ men $=6$ boys
So, $1$ man $=2$ boys
$3$ men or $6$ boys can finish a work in $20$ days.
$4$ men and $12$ boys $=4+6$ men $=10$ men.
$3$ men can finish a work in $20$ days.
$10$ men can finish the work in $\frac{20\times 3}{10}=6$ days.