Everything Maths Grade 10

Step 2: Multiply the area of the base by the height of the solid to find the volume

volume=area of baseheight

=

1

2

bhH

= 40 20

=800 cm^3

Step 3: Write the final answer

The volume of the triangular prism is 800 cm^3.

Worked example 7: Finding the volume of a cylinder

QUESTION

Find the volume of the following cylinder (correct to 1 decimal place):

4 cm

15 cm

SOLUTION

Step 1: Find the area of the base

area of circle=r^2

=(4)^2

= 16cm^2

Step 2: Multiply the area of the base by the height of the solid to find the volume

volume=area of baseheight

=r^2 h

= 16 15

754,0 cm^3

Step 3: Write the final answer

The volume of the cylinder is 754,0 cm^3.

430 13.2. Right prisms and cylinders