# Unit 22 Section 1 : Volume using the Unit Cube

This section introduces the idea of volume by counting up how many 1 cm cubes there are in a solid.

The 1 cm cube The volume of this cube is 1 cm³ (1 cubic centimetre)

Example
We want to find the volume of this solid: We can see that this solid is made up of five 1 cm cubes like the one above.
The volume of the solid is 5 cm³ (5 cubic centimetres).

Practice Question
Work out the answer to this question then click to see whether you are correct.
What is the volume of this solid?  ## Exercises

Work out the answers to the questions below and fill in the boxes. Click on the button to find out whether you have answered correctly. If you are right then will appear and you should move on to the next question. If appears then your answer is wrong. Click on to clear your original answer and have another go. If you can't work out the right answer then click on to see the answer.

Question 1
Work out the volume of each of the cuboids below:

 (a) cm³  (b) cm³  (c) cm³  (d) cm³  Question 2
Work out the volume of each of the solids below:

 (a) cm³  (b) cm³  (c) cm³  Question 3
The diagram below shows the cubes that are used to make the first layer of a cuboid. (a) How many cubes are there in the first layer? cubes  (b) What is the volume of the cuboid if it is made up of 6 layers? cm³  Question 4
A cuboid is built from 1 cm cubes on top of the rectangular base shown below. (a) How many cubes are there in the first layer? cubes  (b) If there are 4 layers, what is the volume of the cuboid? cm³  Question 5
The diagram below shows a large cube made from 1 cm cubes. (a) How many small cubes are in each layer of the large cube? cubes  (b) What is the volume of the large cube? cm³  Question 6
Work out the volume of this cube. Volume = cm³  Question 7
Look at the cube below. (a) What is the volume of the cube? cm³  (b) The top layer is cut off. What is the volume of the remaining solid? cm³  Question 8
Sally is asked to make a cuboid with sides of length 7 cm, 3 cm and 4 cm.
She runs out of cubes when she has made the shape shown below: (a) What is the volume of the shape she has made? cm³  (b) How many more cubes would she need to make the required shape? cubes  Question 9
Work out how many of each of the shapes below you would need to make a 1 cm cube.
 (a) You would need of these to make a 1 cm cube.  (b) You would need of these to make a 1 cm cube.  Question 10
What is the volume of each of these shapes? Give your answers as decimals.
 (a) cm³  (b) cm³  You have now completed Unit 22 Section 1
 Your overall score for this section is Correct Answers You answered questions correctly out of the questions in this section. Incorrect Answers There were questions where you used the Tell Me button. There were questions with wrong answers. There were questions you didn't attempt.
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Produced by A.J. Reynolds January 2001