Question

I need help I already know it’s not 490

Answer 1

440in²

Explanation:

bottom cube-

4 * 2 * 10 = 80in²

10 * 10 * 2 = 200in²

the spot where they meet must be removed.

5 * 5 = 25in²

200 - 25 = 175in²

Top cube-

4 * 5 * 8 = 160in²

5 * 5 = 25in²

SA(Surface area) =80 + 175 + 160 + 25 = 440in²

SA=440in²

Answer 2

440in²

Explanation:

Starting with the cuboid at the bottom

4 * 2 * 10 = 80in²

10 * 10 * 2 = 200in²

The area where the two cuboids connects needs to be removed.

5 * 5 = 25in²

200 - 25 = 175in²

Top cuboid

4 * 5 * 8 = 160in²

5 * 5 = 25in²

Surface Area = 80 + 175 + 160 + 25 = 440in²