Question

If $15$ men can complete a piece of work in $30$ days, then how many days will it take for $18$ men to complete it?

• A. $22$ days
• B. $25$ days
• C. $15$ days
• D. $29$ days

Answer 1

The correct option is B $25$ days

More number of people, then less number of days.

Let $18$ men complete the work in $x$ days, then

$18:30::15:x$

$⟹18\times x=15\times 30$

$⟹x=\frac{15\times 30}{18}$

$⟹x=25$

Hence, $18$ men can complete the work in $25$ days.