These videos deal with surface area of a cylinder formula questions aimed at around grade 5. They can be a little challenging and you might need to use the formula in a number of ways – particularly the second question of video 2.
– A solid cylinder has a height of 12cm and a radius of 5cm. Work out the total surface area. Give your answer correct to 3 significant figures.
– A solid cylinder has a diameter of 3m and a height of 8m. Work out the total surface area of the cylinder. Give your answer in terms of .
– A solid cylinder is cut in half to form a semi-cylinder with a radius of 10cm and a length of 62cm. Calculate the total surface area of the semi-cylinder. Give your answer correct to 2 decimal places.
– A solid cylinder has a radius of x metres and a height of 12 metres. The total surface area of the cylinder is 216m³. Find the value of radius.
Here’s a link to the questions: QT Surface area of a cylinder
and here’s the answer paper: QT – Surface area of a cylinder ANSWERS apologies for the fairly basic pdf – it might be better to watch the video 🙂
These types of questions appear in all the main GCSE exam boards – Edexcel, AQA, OCR and Educas.
Top Tips!
- Draw a net to help you with your calculations
- Try to work methodically and, preferably, down the page
- You might not need to work out until the very end
Here’s a post that also might be of interest:
How to calculate the volume of a cylinder
Volume question with algebra – Level 4 GCSE maths
How to calculate ratio in ‘more than’ questions; grade 4 GCSE maths
Please do leave a comment below if you are not sure. Alternately you can view my YouTube channel and leave a comment there – I’ll always try to respond as quickly as possible.
Watch these videos on YouTube:
Hi, thank you so much, your videos are brilliant!
I home ed my 13 year old son and I find it very useful as we are now coming up against harder questions which I am struggling with being able to work out myself.
The cylinder question with the factorising we found exceptionally difficult, is there any more of your videos where you explain more about this and more practice with how to spot this is what is wanted, as this was one of the problems; I wouldn’t have thought to do factorisation, it really stumped me.
Thank you so much
Amanda
Hi Amanda
Thank you for your comment and very much appreciated. I’m delighted that you found the question useful, and appreciate your comments regarding factorising. Unfortunately I’m not sure of any similar questions – although will try to post fairly frequently. Perhaps I could direct you to https://www.3minutemaths.co.uk/tough-maths-questions/ that will be updated regularly? In the meantime https://www.3minutemaths.co.uk/gcse-revision-by-grade/ might also be useful. Wishing you every success and please do let me know if I can be of any help.
Kind Regards S