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Need help with integration question

I've managed to get part A but I don't know how to solve part b. I've tried looking at the mark scheme but still don't understand. I've attached the question and answer below. Any help would be appreciated, thanks.

Reply 1

Original post
by Y12EC
I've managed to get part A but I don't know how to solve part b. I've tried looking at the mark scheme but still don't understand. I've attached the question and answer below. Any help would be appreciated, thanks.

I think volumes o revolution are now in further maths.

Reply 2

Original post
by mqb2766
I think volumes o revolution are now in further maths.

I only do A-level edexcel maths, would this be a question out of the spec? It was under one of the integration work sheets on pmt

Reply 3

Original post
by Y12EC
I only do A-level edexcel maths, would this be a question out of the spec? It was under one of the integration work sheets on pmt

I presume its an old sheet so yes its now out of spec See 5.1 in
https://qualifications.pearson.com/content/dam/pdf/A%20Level/Mathematics/2017/specification-and-sample-assesment/a-level-l3-further-mathematics-specification.pdf

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