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# Maximum and minimum problem watch

1. Attachment 475605
Hello everyone.

I need some guidence on how to do part a for this question. Can you help? Sorry that the image is the wrong way round. The question is in the attachment. :-)
2. (Original post by Electrogeek)
Attachment 475605
Hello everyone.

I need some guidence on how to do part a for this question. Can you help? Sorry that the image is the wrong way round. The question is in the attachment. :-)
Hint: Think about what the gradient would be at the minimum and maximum points.
3. (Original post by Electrogeek)
Attachment 475605
Hello everyone.

I need some guidence on how to do part a for this question. Can you help? Sorry that the image is the wrong way round. The question is in the attachment. :-)
Form two equations, one for volume and another for total surface area, see if you can re-arrange and eliminate the term to get what the question wants you to.
4. (Original post by FishLover)
Hint: Think about what the gradient would be at the minimum and maximum points.
He's asking about part (a) - I can't quite see how specific values of helps construct .
5. (Original post by Zacken)
He's asking about part (a) - I can't quite see how specific values of helps construct .

Didn't really read the oP. On my phone atm and the picture won't load ugh
6. (Original post by FishLover)
Didn't really read the oP. On my phone atm and the picture won't load ugh
Haha, that's fine then - the title was a bit misleading, so it's no fault of yours.
7. (Original post by Zacken)
Haha, that's fine then - the title was a bit misleading, so it's no fault of yours.
Sorry about it being misleading - that was just the title to the problem. :-) Managed to do it now.
8. (Original post by Electrogeek)
Sorry about it being misleading - that was just the title to the problem. :-) Managed to do it now.
Don't fret it, your post had enough to clarify what the problem was, glad you managed to do it!

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