Based on the table, the juice box has a volume of 250 \text{ mL}. So the best estimate for the capacity of a tea cup is 250 \text{ mL} because a juice box and a tea cup are similar in size. So, the correct answer is A.

Idea summary

We often use millilitres \text{(mL)} and litres \text{(L)} to measure the capacity of liquids.

We can use capacities of known containers to estimate the capacities of other containers.

Units of capacity

How do we know which unit of capacity to use?

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Examples

Example 2

Choose the most appropriate unit of measure for finding the amount of water in a clothes washing machine.

Millilitres

Litres

Worked Solution

Create a strategy

Use the table of examples below to help you.

Object	Best unit
Glass of juice	Millilitres
Carton of juice	Litres

Apply the idea

A carton of juice is bigger than a glass of juice, so it is closer to the amount of water in a washing machine. So we should also use litres for finding the amount of water in a washing machine.

The correct answer is B.

Idea summary

A millilitre is about the size of a drop of water.

A litre is about the size of a milk carton.

Outcomes

AC9M5M01

choose appropriate metric units when measuring the length, mass and capacity of objects; use smaller units or a combination of units to obtain a more accurate measure

9.11 Units of capacity

Ideas

Are you ready?

Examples

Example 1

Units of capacity

Examples

Example 2

Outcomes

AC9M5M01

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