Question

2 cubes of edges 5 and 218^1/3 are melted to a cube.find edge of new cube

Answer 1

Answer: Volume of resulting metal cube =  Volume of metal cube 1+ Volume of metal cube 2+ Volume of metal cube 3

Volume of a cube =a

3

Let side of the resulting cube be A.

So, A

3

=3

3

+4

3

+5

3

=>A

3

=27+64+125

=>A

3

=216

=>A=6

Hence, length of side of the resulting metal cube is 6cm.

Total surface area of a cube =6a

2

=6×6

2

=216cm

2

Step-by-step explanation:

Answer 2

refer the given attachment