Asked by Sharon
Make r the subject of the formula A= pi r (l+r)
Answers
Answered by
oobleck
A = πr(l+r) = πr^2 + πrl
πr^2 + πlr - A = 0
r = (-πl ±√((πl)^2 - 4πA))/(2π)
Who would want half the area of a cylinder?
πr^2 + πlr - A = 0
r = (-πl ±√((πl)^2 - 4πA))/(2π)
Who would want half the area of a cylinder?
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