Question

The side of a square is 10 cm. How many times will the new perimeter become if the side of the square is doubled?​

• A. 2 times
• B. 4 times
• C. 6 times
• D. 8 times

Answer 1

The correct option is A 2 times

Correct option is (a).
Side of a squae $=10\text{cm}$,
Perimeter of square $=4\times \text{side}$
$=4\times 10\text{cm}$
$=40\text{cm}$.

Side of square after doubling the length $=20\text{cm}$
Perimeter of new square $=4\times \text{new side}$
$=4\times 20\text{cm}$
$=80\text{cm}$
Thus, the new perimeter will also be doubled, if the side of the square is doubled.
Hence, (a) is the correct answer.