How do you do this? (1 Viewer)

[Run hard@thehsc]

Question 11B. I got an answer, but am not sure if the method is viable....

 

[mmmmmmmmaaaaaaa]

I got 28/15 pi for B
All it is asking is for the integral between 0 and 1
and then to use the volumes of revolution formula about x-axis
- all you need to do for this is square your (y^2+1)
You should be able to get it from there

I can send my proper working if you want

 

[Run hard@thehsc]

K cool I got that