Volume of composite objects

Find the volume and capacity of objects built from prisms and cylinders by adding or subtracting simpler solids.

⏱ 20 min❓ 9 questions

What you'll be able to do

✔I can find the volume of a composite object by adding the volumes of its parts
✔I can find the volume of hollow objects by subtracting the part that has been removed
✔I can convert between volume and capacity, using 1 cm³ = 1 mL and 1 m³ = 1000 L

How this works

1Read the short explanations first — they teach you what you need before each question.
2Answer each question, then tap Check. A right answer moves you on automatically; if it's wrong, you'll see a friendly explanation of why.
3Finish all 3 steps to see your score — sign in and subscribe to unlock the full lesson and save it.

What's inside

9 questions and 1 quick teaching card, including:

🔢Number answer — Work out the answer and type the number.

👪Grown-up tip: sit alongside younger learners for the first few lessons. Read the questions together and chat about the explanations — that's where the real learning sticks.

Curriculum: AC9M10M01