Starter Questions

1. Calculate the circumference and area of a circle with radius 3cm

2. I invest £340 in a bank that pays 6% interest per annum. How much interest should I expect to get back after 1 month?

3. Terry received in his Music exam and in his Art exam By converting each mark to a percentage, which subject did Terry do better in?

Volume

Learning Intention

To understand the term liquid volume using millilitres and litres.

1 cm

1 cm

1 cm

Volume = = 1 cm³ x h x b l

How much water does this hold?

A cube with volume 1cm³ holds exact 1 millilitre of liquid.A volume of 1000 ml = 1 litre.

Liquid Volume

Example 1

12 cm

6 cm

3 cm

OrangeFlavour

Volume = l x b x h

V = 6 x 3 x 12

V = 216 cm³

= 216 ml

So the carton can hold 216 ml of orange juice.

How much juice canthis carton hold?

Remember:1 cm³ = 1 ml

WorkingLiquid Volume

Example 2

50 cm

100 cm

30 cm

Volume = l x b x h

V = 100 x 30 x 50

V = 150 000 cm³

= 150 000 ml

So the fish tank can hold 150 litres of water.

How much water can this fish tank hold in litres?

1cm3 = 1 ml

1000 ml = 1 litre

= 150 litres

WorkingLiquid Volume

Now try Ex 6.3Ch6 Pg 48

Liquid Volume