Question

If $105\mathrm{kg}$ corn is enough to feed $9$ horses in a day, how much corn will be needed to feed $12$ horses?

Answer 1

$9$ horses require $105\mathrm{kg}$ of corn to feed in a day
$1$ horse requires corn in a day = $\frac{105\mathrm{kg}}{9}$= $11.67\mathrm{kg}$
$12$ horses needed corn in a day = $12\times 11.67\mathrm{kg}$ = $140\mathrm{kg}$
So, to feed $12$ horses the corn requires in a day is$140\mathrm{kg}$.