Question

I don’t understand what to do

Answer 1

Find the S.A of all the cubes and then add them together.

S.A = 6a²

a is the side length

S.A = 6(3)² = 54
S.A = 6(2)² = 24
S.A = 6(1)² = 6

Now add them all together.

54 + 24 + 6 = 84

So the total surface area is 84

Hope this helps :)