Mind boggling! (For me, at least)

Subtract 2Pi*r^2 from both sides of the equation. then 2Pir*h= 1435-2Pir^2 next divide both sides by 2Pir giving h= (1435-2Pir^2)/2Pir . substitute 4.87 for r and the calculator value for Pi and you can get a numerical value for h.

You have saved my life! Thank you!

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