Torroid Formula

Hi its Tabraze,
	This is the formula i am using to calculate the capacitance of my torroid
1.4(1.2781-(d2/d1))*SQRT(pi*d2(d1-d2)) = x. Given x and d2 can anyone with
MathCad or some other program please re-arange the above formula for me. It
would be of great help.

Thanks in advance



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