Question

Three cubes of edges 3 cm, 4 cm and 5 cm are melted and cast into a new cube. Find the edge of the new cube.​

Answer 1

Answer:

Cubes with edge 5,3,4

volume of eah cube will be

=(5×5×5),(4×4×4), (3×3×3)

=125,64,27

total volume will be 125+64+27=216

this volume will be of new formed cube

side of cube =cube root of volume

= 6

lateral surface area of cube is 4×(side×side)

=4×(6×6) =4×36 =144

Answer 2

Answer:

Edge of new cube = 6cm

Hope this answer helps you!