A rectangular cubical piece of metal of dimensions 2 cm*3cm*4cm is melted.Some more of the metal is added and it is made into a cube .The cube has integral measures for its sides.what is the minimum amount of metal that is added and what is the size of this cube?


Hi, 
Volume of the metallic cuboid

= l × b × h

= 2 × 3 × 4 = 24 cubic cm.

The smallest cube nearer to 24 is 27.

Therefore, 

The minimum amount of metal to 
be added =27-24=  3 cubic cm.

Thus 
the volume of the cube formed 
= 27 cubic cm.

But a3 = 27

a = 3 cm.

Hence the length of side of the cube formed
is 3 cm .

 

  • 0
What are you looking for?