Junior Cycle · Area, Volume and Measurement
⏱ Tested in 4 exam questions since 2022
Lesson 5 of 7
JCHL AVM 5: Cylinders
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- Convert first: if the question mixes cm and m, change everything to one unit before you substitute
- Volume: V = πr²h (cubed units). Curved surface area: A = 2πrh — the label part only. Both are on page 10 of your maths tables
- Total surface area (TSA) is the whole outside of a closed cylinder: the curved label part plus the two flat circular ends = 2πrh + 2πr². This is NOT in your maths tables — learn it
Formula used
V = π r²h
Curved surface area: A = 2π rh
Total surface area = 2π rh + 2π r² — MUST LEARN
On page 10 of the log tables — read it off, don’t memorise.Most recent exam questions
- 2025 Q7(d)
- 2025 Q7(e)
- 2024 Q4(c)
- 2023 Q3(b)
- 2023 Q3(c)
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