Question

The edges of three cubes of metal are 3cm 4cm and 5cm. Melted and formd into a single cube find the edge of new cube

Answer 1

Cube 1 volume =a2
=3x3=9cm2
Cube 2 volume =l2
=4x4=16cm2
Cube 3 volume =n2
=5x5=25cm2

Now, sum of volumes of all three goven cubes= volume of required cube
9+16+25=50cm2

Now volume of required cube is 50cm2
Therefore, a2=50
a=√​50​ ANS

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