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Measure - Standard units of capacity (ml, l)

Grade 3IGCSE

Review the key concepts, formulae, and examples before starting your quiz.

🔑Concepts

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Capacity is the amount of liquid a container can hold.

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Millilitres (ml) are used to measure small amounts of liquid (e.g., a spoon, a small juice box).

•

Litres (l) are used to measure large amounts of liquid (e.g., a bucket, a large water bottle).

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Measuring containers often have a 'scale' with marks to show the volume of liquid inside.

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Comparing capacities involves looking at the numerical value and the unit (1 litre is much larger than 1 millilitre).

📐Formulae

1 litre (l)=1000 millilitres (ml)1 \text{ litre (l)} = 1000 \text{ millilitres (ml)}

12 litre=500 ml\frac{1}{2} \text{ litre} = 500 \text{ ml}

14 litre=250 ml\frac{1}{4} \text{ litre} = 250 \text{ ml}

💡Examples

Problem 1:

Convert 3 litres into millilitres.

Solution:

3000 ml

Explanation:

Since 1 l=1000 ml1 \text{ l} = 1000 \text{ ml}, we multiply 3 by 1000. 3×1000=3000 ml3 \times 1000 = 3000 \text{ ml}.

Problem 2:

A measuring jug has marks every 200 ml. If the water reaches the 3rd mark, how much water is in the jug?

Solution:

600 ml

Explanation:

Each mark represents 200 ml. To find the total, multiply the value of the mark by the number of marks: 200 ml×3=600 ml200 \text{ ml} \times 3 = 600 \text{ ml}.

Problem 3:

A bucket contains 5 litres of water. You use 1500 ml to water some plants. How much water is left in the bucket in millilitres?

Solution:

3500 ml

Explanation:

First, convert the bucket capacity to ml: 5 l=5000 ml5 \text{ l} = 5000 \text{ ml}. Then, subtract the amount used: 5000 ml−1500 ml=3500 ml5000 \text{ ml} - 1500 \text{ ml} = 3500 \text{ ml}.

Problem 4:

Which is greater: 750 ml or 1 litre?

Solution:

1 litre

Explanation:

1 litre is equal to 1000 ml. Since 1000 is greater than 750, 1 litre is the greater capacity.