Upcoming SlideShare
×

# Volume of Cubes and Cuboid

21,642 views

Published on

• Full Name
Comment goes here.

Are you sure you want to Yes No
• Be the first to comment

### Volume of Cubes and Cuboid

1. 2. Lesson Objective <ul><li>In this lesson, you will learn and understand: </li></ul><ul><li>The concept of volume </li></ul><ul><li>The Difference between Cube and Cuboid </li></ul><ul><li>Finding the Volume of Cube </li></ul><ul><li> and Cuboid </li></ul>
2. 3. What is volume? <ul><li>The volume of a solid, cube or cuboid refers to the capacity of the </li></ul><ul><li>solid or the amount of space </li></ul><ul><li>inside the solid. </li></ul>
3. 4. <ul><li>Volume of CUBE = LENGTH X LENGTH X LENGTH </li></ul><ul><li> = X X </li></ul><ul><li> = ³ </li></ul>LENGTH LENGTH LENGTH A Cube has 6 square faces. The length of each square face is equal .
4. 5. The solid shown below is made up of twenty-seven 1-cm cubes. Find the volume of the solid. Method 1 Volume of one 1-cm cube = 1 x 1 x 1 cm ³ = 1 cm ³ Volume of twenty-seven 1 cm cubes = 27 x 1 cm ³ = 27 cm³ The volume of the cube is 27 cm³ Method 2 Volume of cube = 3 x 3 x 3 cm ³ = 27 cm ³ The volume of the cube is 27 cm³ 3 cm 3 cm 3 cm
5. 6. Example 1 <ul><li>Volume of cube = x x </li></ul><ul><li> = 5 x 5 x 5 </li></ul><ul><li> = 125cm ³ </li></ul>5 cm 5 cm 5 cm Find the volume of the cube.
6. 7. Example 2 Volume of present = x x = 10 x 10 x 10 = 125cm ³ The present shown on the left is a present given to class 1T1 for winning the Cheer Competition. Find the volume of the present if it is a cube. 10 cm
7. 8. <ul><li>Volume of CUBOID = LENGTH X BREADTH X HEIGHT </li></ul><ul><li> = X X </li></ul>C U B O I D A cuboid also has 6 faces but NOT all the faces are equal Length Breadth Height
8. 9. Example 3 <ul><li>Volume of cuboid = x x </li></ul><ul><li> = 10 x 4 x 4 </li></ul><ul><li> = 160cm ³ </li></ul>Find the volume of the cuboid shown below. 10cm 4cm 4cm
9. 10. <ul><li>Volume of cuboid </li></ul><ul><li>= x x </li></ul><ul><li>= 7 x 5 x 15 </li></ul><ul><li>= 525m ³ </li></ul>Example 4 7m 5m 15m
10. 11. Practice Try these questions yourself. Make sure you solve the question first before proceeding... NEXT
11. 12. Question 1 <ul><li>Volume of cube </li></ul><ul><li>= x x </li></ul><ul><li>= x x </li></ul><ul><li>= cm ³ </li></ul>Find the volume of the following solid. 2 2 2 8 2cm 2cm 2cm
12. 13. Question 2 Volume of cube = x x = x x = cm ³ Find the volume of the cube shown below. 6 6 6 216 6cm
13. 14. Question 3 4 3 7 84 7m 4m 3m
14. 15. Question 4 <ul><li>Volume of cuboid = x x </li></ul><ul><li> = m ³ </li></ul>11cm 7cm 6cm 11 7 6 462