Question 166850
solve the formula for the give variable. then it gives me the equation 
A=2πrh for r, 
r = A/(2(pi)h)
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b=2A/h for A,
2A = bh
A = (bh)/2
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P=2x+2w for x,
2x = P - 2w
x = (P-2w)/2
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V=1/3Ar for r.
3ar = 1/V
r = 1/(3aV)
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Cheers,
Stan H.