Question

If each side of a square of side $a$ is tripled, what is the area of the new square formed?

Answer 1

Given:
Side of square = $a$
Since the sides are tripled, then each side will be $3a$.
Since we know that area of square of side $a$ is given by
Area = $a\times a=a^2$
Area of the square of side $3a$ will be:
Area = $3a\times 3a=9a^2$