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Help #5

 Feb 22, 2018
 #1
avatar+17183 
+1

Just put the equation for  V  over the equation for  SA   ....then simplify (I can see right off that pi and a 'r' will 'cancel out')......TRY it !

 Feb 22, 2018
edited by ElectricPavlov  Feb 22, 2018

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