A cube with 2inch sides is placed on a cube with 3inch sides. Then a cube with 1inch sides is placed on the 2inch cube. What is the surface area of the thre
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2 Answer

1. User Answers kelishines
Answer:
Stepbystep explanation:
5 sides of the top cube is exposed.
so we get 1*1*5 = 5 in ^2
the second cube has 4 sides exposed also, so 2^2 * 4 = 16 in ^2, but also it has one side with the cube on top, so we have 41 = 3 on that side, so the overall is 19 in ^2
Then we have for the 3rd cube 5 sides exposed, so we have 3^2 * 5 = 45. We also have the area of the 2 in cube on it, so we get 3^2  2^2 = 94 =5.
So the overall is 45+5+19+5 = 55+19 =74
I hope im right sorry if im not!

2. User Answers indritachandra1999
The surface area of the three cube tower is 79sq inch.
What is surface area?
The quantity of space that covers the outside of a threedimensional form is called surface area.
Total Surface area of a cube = 6 * (a^2) (a is the side of the cube)
Side length of the bottommost cube = 3 inch
Total sides = 6 sides
T.S.A = 6a^2 = 6.(3)^2 = 54 sq inch
Side length of cube in the middle = 2 inch
Total sides = 5 (bottom side is already considered in the 3 inch cube's area)
T.S.A = 5a^2 = 5(2)^2 = 20 sq inch
Side length of the topmost cube = 1 inch
Total sides = 5 (bottom side is already considered in the 2 inch cube's area)
T.S.A = 5(1)^2 = 5 sq inch
The total surface area of the tower is 79 sq inch.
Learn more about surface area on:
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