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

Hint:

When scaling a square, the perimeter scales linearly by the same factor as the side length.

Answer 1

The Correct Option is A

Original perimeter = \(4 \times 10 = 40\) cm
New side length = \(2 \times 10 = 20\) cm
New perimeter = \(4 \times 20 = 80\) cm
Factor of increase = \(80 \div 40 = 2\).