What is unit cube ?
Unit cube is a cube with the side length of 1 unit.
A cube is a three-dimensional square. It is an object with all edges equal in size. A cube has 12 edges. Thus, a unit cube has 12 edges, all measuring 1 unit
The picture will explain how to find the number of unit cubes in the rectangular prism and how we find volume.
Volume of rectangular prism = length x width x height
Work out the volume of the following solids :
Problem 1 :
Solution :
Volume v = l × w × h
= 5 × 5 × 5
= 125 units cube
Problem 2 :
Solution :
Volume v = l × w × h
= 2 × 2 × 2
= 8 units cube
Problem 3 :
Solution :
Volume v = l × w × h
= 3 × 3 × 3
= 27 units cube
Problem 4 :
Solution :
Volume v = l × w × h
= 5 × 4 × 5
= 100 units cube
Problem 5 :
Solution :
Volume v = l × w × h
= 5 × 2 × 3
= 30 units cube
Problem 6 :
Solution :
Volume v = l × w × h
= 3 × 4 × 5
= 60 units cube
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