Question

Express the given information in mathematical form using two variables:

The perimeter of a rectangle is 36 cm.

• A. $x-y=7$
• B. $x+y=12$
• C. $x-y=24$
• D. $x+y=18$

Answer 1

The correct option is D $x+y=18$

Let x and y be the length and breadth of the given rectangle.

Now, $\text{perimeter of rectangle}=2(x+y)$

$\Rightarrow 2(x+y)=36$

$\Rightarrow x+y=18$

$\therefore$ The required expression is $x+y=18$