Question

If the side of a cube is tripled, then the ratio of surface areas of new cube and original cube is

1: 9
9:1
1:3
3:1​

Answer 1

Answer:

Take a cube with 1cm sides. each side has 1cm²

. If you multiply it by 6 the total is 6cm²

Now if you triple the sides they have 3cm per side. The SA per face is now 9cm²

. so if you multiply it buy 6 it comes to a total of

If you were to take the ratio of the 2 cubes it is 6:54. If you simplify it, it comes to 1:9.

I hope you understood this.

so the answer is 1:9