Question

a cubical blocks of metal was melted and recast into 20 cubes of edge 4.5cm.what was the volume of the cubical block?

Answer 1

Area of cobe=(edge)^3

=(4.5)^3=91.125

volume of cubical block=20×91.125

=1822.5cm^3

Answer 2

Given :

A cubical blocks of metal was melted and recast into 20 cubes of edge 4.5cm.

To Find :

what was the volume of the cubical block?

Solution:

Edge of small cube = 4.5 cm

Volume of small cube = $Side^3 = 4.5^3 =91.125 cm^3$

Volume of 20 small cube =$20 \times 91.125 =1822.5 cm^3$

We are given that a cubical blocks of metal was melted and recast into 20 cubes of edge 4.5cm

So, Volume of big cube = Volume of 20 cubes

So, Volume of big cubical block is 1822.5 cubic m