Zara
S = 2*pi*d*sqrt(d^2+h^2)
rearrange to make h the subject



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estudier
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Square everything first...

Zara
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would I not divide everything by 2*pi*d first?

estudier
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Ok, do that first...

Zara
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S/(2*pi*d)=sqrt(d^2+h^2)

estudier
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Square everything...

Zara
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(S/(2*pi*d))^2=d^2+h^2

estudier
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Subtract d^2 and then square root...

Zara
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(S/(2*pi*d))^2d^2=h^2
h=sqrt((S/(2*pi*d))^2d^2)

estudier
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Good enough?

Zara
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So is this my answer:

Zara
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Thank you very much! :)

estudier
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yw:)