SOLUTION: Three metallic cubes of side 3cm, 4cm and 5cm respectively are melted and are recast into a single cube. find the total surface area of the new cube.

Question 954415: Three metallic cubes of side 3cm, 4cm and 5cm respectively are melted and are recast into a single cube. find the total surface area of the new cube.
Found 2 solutions by Fombitz, macston:
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
The volume of metal is,

So the cube has a side length of 6 cm.
The surface area of the cube is,

Answer by macston(5194) (Show Source): You can put this solution on YOUR website!
Cube(1)=3cm; Cube(2)=4cm; Cube(3)=5cm; SA=surface area
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ANSWER: Surface area of the new cube is 216 square centimeters.
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