Q. 13

Three cubes whose edges measure 3 cm, 4 cm, and 5 cm respectively are melted to form a new cube. Find the surface area of the new cube formed.

Answer :


Edge of three cubes are respectively = 3cm , 4 cm , 5 cm


Sum of volume of these cubes =

After melted these cubes a new cube is formed.

Let edge length of this new cube = a cm




Edge of new cube = 6 cm

Surface area of new cube =

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