VOLUME OF SOLIDS
We can calculate the volume of a prism if we know the area of the cross section and the height
(or depth) of the prism.
V=Ah
A
h (or d)
We can calculate the volume of a triangular prism by finding the area of the triangle and
multiplying by the height (or depth) of the prism.
A
h (or d)
Some special prisms have their own formula:
Cuboid
h
V=lbh
b
l
Cube
V=l
3
l
r
Cylinder
h
2
V=πr h
Examples: Calculate the volume of the prisms:
40cm2
7cm
V=Ah
V = 40 × 7
V = 280cm2
Write the formula.
Substitute numbers into the formula.
Calculate answer, include the units.
V = π r2 h
V = π × 52 × 6
V = 471·2cm2
6cm
Write the formula.
Substitute numbers into the formula.
Calculate answer, include the units.
5cm
Volume of Solids Practice
http://www.cimt.plymouth.ac.uk/projects/mepres/book9/bk9i9/bk9_9i4.html
Answer question on volume.
www.supermathsworld.com Ask your teacher for login details.
Select SHAPE from the options.
Select CUBOIDS from the menu. Try on Easy and Medium level.
Select VOLUME from the menu. Try on Easy and Medium level.
http://www.bbc.co.uk/education/guides/z2ctyrd/revision/7
Revise volume of prisms. Try the testbite.