# rearrange equation

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• Dec 4th 2009, 01:57 PM
scarface1
rearrange equation
G= pi x D^2/ 4JL

Hi how can I rearrange this to give me a value of D??

Thank you for your help in advance.
• Dec 4th 2009, 02:02 PM
Raoh
$G=\left (\frac{\pi x}{4JL} \right )D^2$
$D^2=\frac{G}{\frac{\pi x}{4JL}}$
$D^2=\frac{G4JL}{\pi x}$
$D=$ $+\sqrt{\frac{G4JL}{\pi x}}$ or $-\sqrt{\frac{G4JL}{\pi x}}$
• Dec 4th 2009, 02:06 PM
scarface1
Oh thank you soo much for your prompt reply!!