<PRE><B>Question 237596</B>
s=2&amp;#960;r(r+h), for h

s = 2&amp;#960;r^2 + 2&amp;#960;rh

(s - 2&amp;#960;r^2) = 2&amp;#960;rh

(s - 2&amp;#960;r^2)/2&amp;#960;r = h



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