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Solve for the Specified Variable L=2πrh+2πr2; for r\mathrm { L } = 2 \pi \mathrm { rh } + 2 \pi \mathrm { r } ^ { 2 } \text {; for } \mathrm { r }

Question 120

Multiple Choice

Solve for the specified variable. Assume that all other variables are nonzero
- L=2πrh+2πr2; for r\mathrm { L } = 2 \pi \mathrm { rh } + 2 \pi \mathrm { r } ^ { 2 } \text {; for } \mathrm { r }


A) r=πh±π2 h2+2πL2π\mathrm { r } = \frac { \pi \mathrm { h } \pm \sqrt { \pi ^ { 2 } \mathrm {~h} ^ { 2 } + 2 \pi \mathrm { L } } } { 2 \pi }
B) r=πh±π2h22πL2πr = \frac { - \pi h \pm \sqrt { \pi ^ { 2 } h ^ { 2 } - 2 \pi L } } { 2 \pi }
C) r=πh±π2h2+2πLπr = \frac { - \pi h \pm \sqrt { \pi ^ { 2 } h ^ { 2 } + 2 \pi L } } { \pi }
D) r=πh±π2h2+2πL2πr = \frac { - \pi h \pm \sqrt { \pi ^ { 2 } h ^ { 2 } + 2 \pi L } } { 2 \pi }

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