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?

विकल्प

• 2 times

• 4 times

• 6 times

• 8 times

Answer 1

2 times

Explanation:

Given, side of a square = 10 cm

We know that, perimeter of a square = 4 × Side = 4 × 10 = 40 cm

∴ Perimeter of old square = 40 cm

Now, Side of the square is doubled.

New side = 2 × 10 = 20 cm

Again, perimeter of new square = 4 × Side

= 4 × 20

= 80 cm

∴ New perimeter = 2 × (Old perimeter)

= 2 × 40

= 80 cm

Hence, the new perimeter is 2 times of the old perimeter.