Given
each edge of a cube is 7.8 cm
Find out the best estimate for the volume of a cube.
To proof
As given in the question
each edge of a cube is 7.8 cm long
Let us assume the rounded up value of the edge of a cube.
Take each edge of a cube is 8cm
FORMULA
Volume of cube = a³
where a represent the length of one edge.
a = 8 cm
put this in the above formula
we get
Volume of cube = 8× 8× 8
= 512 cm³
Therefore the estimate for the volume of the cube is 512 cm³
option (c) is correct
Hence proved
