1. PRISMS
Prisms are solids with identical ends. NO
YES
YES NO NO
YES

2. Volumes of Prisms
This is given by V = area X length
Example
30m
2.3m2
V = area X length
= 2.3 X 30
= 69m3

3. Example 14cm 5cm ******** Area of triangle = b X h  2
V = area X length
= 5 X 2.4  2
= 6 X 14
= 6cm2
= 84cm3

4. A swimming pool is 30m long, 10m wide,
the shallow end is 1m deep
and the deep
end is 2.5m deep.
1m3 is the same as 1000 litres. How many litres does it take to fill the pool?

5. Area Area rectangle = 30 x 1 = 30 m2 Area triangle = 30 x 1.5  2
Total area = 52.5m2
Vol = area X width
= X 10
= 525m3
No. litres = 1000 X 525 = litres.

6. CYLINDERS Base is a circle. Area of base = r2 Vol = area X height
So V = r2h
Example
d = 12cm so r = 6cm,
h = 20cm
V = r2h
= 3.14 X 6 X 6 X 20 =
12cm
= 2260cm3
20cm

7. A tea urn is 50cm high with a diameter of 34cm.
Example
34cm
A tea urn is 50cm high with a diameter of 34cm.
If 1litre =1000cm3 then find its volume in litres.
50cm
A mug holds 290mls. How many full mugs can be filled from the urn?
**********
NB: 1ml = 1cm3
d = 34 so r = 17
No. mugs =  290
V = r2h
= 3.14 X 17 X 17 X 50
= …
= 45373
= 156 full mugs
= 45400cm3
( 1000)
= 45.4 litres