Question

The perimeter of a rectangle with sides $20$ cm and $12$ cm is cm and the area is square cm.

• A. $240$
• B. $64$
• C. $200$
• D. $32$
• E. $60$
• F. $180$

Answer 1

Answer: (A), (B)

$64$

For a rectangle, we know that the opposite sides are equal.

So, the perimeter $=$ sum of all $4$ sides $=12+20+12+20$
$=2(12+20)$
$=2\left(32\right)$
$=64$ cm

To find out the area, we will count how many squares of unit length can fit into the rectangle.

We can see, $20$ squares will fit along the length of the rectangle while $12$ squares will fit along the breadth.


So, the area of the rectangle will be $=20\times 12=240$ square cm