x Turn on thread page Beta
 You are Here: Home >< Maths

# Can someone do this GCSE maths question? watch

1. Please can someone good at maths do this question? I keep getting 22,476 for the final answer.

On the mark scheme it says (pi)(4^2)(90) is 4527, but I get it as 4523? I'm not sure if the Pi on my calc or something is wrong, but I can't get this? thank you
2. (Original post by jazz_xox_)
Please can someone good at maths do this question? I keep getting 22,476 for the final answer.

On the mark scheme it says (pi)(4^2)(90) is 4527, but I get it as 4523? I'm not sure if the Pi on my calc or something is wrong, but I can't get this? thank you
Hmm very strange. I also got 22,476 as the answer and (pi)(4^2)(90) as 4523. Is this AQA? What exam season is this past paper from?
3. No my calculator says the same :/
Mark scheme is wrong
4. I also got 22,476. I think the mark scheme is wrong.
5. OMG MATHS <3

Anyways

Area of a Cuboid = Length x Width x Height
Area of the cuboid = 90cm x 15cm x 20cm = 27000cm3 (cubed)

Area of cylinder = (2 x π x r x h) + (2 x π x r x 2)
Area of cylinder = (2 x π x 4 x 90) + (2 x π x 4 x 2)
Area of cylinder = 2312.21cm2 (to 2 decimal places)

Area of remaining Concrete cuboid = Area of cuboid - Area of cylinder
therefore Area of remaining concrete cuboid = 24687.79

Please check it is right as I'm tired lol.
6. ah thank you everyone, i was sure i was right! @rosiehannay yes its AQA, June 2014 Paper 1
7. (Original post by jazz_xox_)
Please can someone good at maths do this question? I keep getting 22,476 for the final answer.

On the mark scheme it says (pi)(4^2)(90) is 4527, but I get it as 4523? I'm not sure if the Pi on my calc or something is wrong, but I can't get this? thank you
Yep I got the exact same thing. By the way, quick question, do they give you formaulas eg volume of a cylinder in the exam paper?
8. I just found the paper the question is from and had a look at the mark scheme. It doesn't say the volume of the cylinder is 4,527, it says the answer can be between 4,500 and 4,527 - obviously allowing people to use different numbers as pi. It says the final answer can be between 22,473 and 22,500 so yes, all our answers were correct
9. (Original post by Bulletzone)
OMG MATHS <3

Anyways

Area of a Cuboid = Length x Width x Height
Area of the cuboid = 90cm x 15cm x 20cm = 27000cm3 (cubed)

Area of cylinder = (2 x π x r x h) + (2 x π x r x 2)
Area of cylinder = (2 x π x 4 x 90) + (2 x π x 4 x 2)
Area of cylinder = 2312.21cm2 (to 2 decimal places)

Area of remaining Concrete cuboid = Area of cuboid - Area of cylinder
therefore Area of remaining concrete cuboid = 24687.79

Please check it is right as I'm tired lol.
This isn't what I got, I did the cylinder inside as 16π x 90 and got 4523.89 and then took that from 27000
10. (Original post by rosiehannay)
I just found the paper the question is from and had a look at the mark scheme. It doesn't say the volume of the cylinder is 4,527, it says the answer can be between 4,500 and 4,527 - obviously allowing people to use different numbers as pi. It says the final answer can be between 22,473 and 22,500 so yes, all our answers were correct
ah thank you, my mistake
11. (Original post by Bulletzone)
OMG MATHS <3

Anyways

Area of a Cuboid = Length x Width x Height
Area of the cuboid = 90cm x 15cm x 20cm = 27000cm3 (cubed)

Area of cylinder = (2 x π x r x h) + (2 x π x r x 2)
Area of cylinder = (2 x π x 4 x 90) + (2 x π x 4 x 2)
Area of cylinder = 2312.21cm2 (to 2 decimal places)

Area of remaining Concrete cuboid = Area of cuboid - Area of cylinder
therefore Area of remaining concrete cuboid = 24687.79

Please check it is right as I'm tired lol.
What? Yeah buddy, you are tired Why are you working out the area?.. Just go to sleep
12. (Original post by jazz_xox_)
ah thank you, my mistake
No problemo
13. (Original post by rosiehannay)
What? Yeah buddy, you are tired Why are you working out the area?.. Just go to sleep
I can't, Left French homework for the last day
14. (Original post by Bulletzone)
I can't, Left French homework for the last day
Hope you're not too tired for that
15. How is that 5 marks? It's so easy?

TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Updated: April 5, 2016
Today on TSR

### Four things top students are doing

Over the Easter break

Poll
Useful resources

### Maths Forum posting guidelines

Not sure where to post? Read the updated guidelines here

### How to use LaTex

Writing equations the easy way

### Study habits of A* students

Top tips from students who have already aced their exams