Question

If the edge of a cube is trebled ,what will be the change in the surface area

Answer 1

3a3 will be the formula ............
hope it helps u

Answer 2

Let the edge of given cube be a

TSA of given cube = 6 * a^2 ------------(1)

Edge of new cube = 3a

TSA of new cube = 6* (3a)^2
= 6*9a^2
= 54a^2 ----------(2)

By equation 1 and 2, we can say that

TSA of new cube = 9 * TSA of given cube