Question

if the edge of a cube is doubled ,what will be the change in it's surface area?​

Answer 1

Answer:

4 times

Step-by-step explanation:

Let us explain with an example,

a= 2 cm

Surface area = 4a^2

= 4*4 = 16 cm^2

Now, doubled edge = 2*2=4 cm

Surface area = 4a^2

= 4 * 16 = 64 cm^2

Times it increased = 64/16 = 4.....