Question

A farmer wants to buy some horses, and every horse he buys requires $2$ acres of land. If the farmer has $18$ acres of land, write an inequality representing the possible number of horses he can buy. (where $a$ is number of horses)

• A. $2a\le 18,a\in R$
• B. $2a<18,a\in I$
• C. $2a\le 18,a\in W$
• D. $2a\le 18,a\in N$

Answer 1

The correct option is C $2a\le 18,a\in W$

$\because$ Each horse requires $2$ acres of land
$\therefore a$ horses requires $2a$ acres land.
Since, total acres of land $=18$
Hence, inequality is $2a\le 18$
$\because$ number of horses will be non-negative integers
$\therefore 2a\le 18,a\in W$