Question

the edges of three cube of metal are 3cm,4cm,5cm. they are melted and formed into a single cube . find the edge of the new cube

Answer 1

Answer is given above

Answer 2

Answer:

Length of each side of the edge of new cube  = 6 cm

Step-by-step explanation:

Volume of new cube = Volume of 3 old cubes  

Let the new side be X.  

∴ X³ = 3³ + 4³ + 5³  

∴ X³ = 216  

So the Volume of Cube = 216 cm³

∴ X = 6 cm - Length of each side of the edge of new cube