Question

If the perimeter of the rectangle above is $72$, what is the value of $x$?

• A. 9
• B. 15
• C. 18
• D. 21
• E. 36

Answer 1

The correct option is C 18

Given, perimeter of rectangle $=72$ and two sides are $(x+3)$ and $(x-3)$

We need to find value of $x$

The perimeter of the above rectangle is

$x+3+x-3+x+3+x-3=72$

$\Rightarrow 4x=72$

$\Rightarrow x=18$