Answer
3$\pi$$r^{2}$
Work Step by Step
$\pi$$r^{2}$ + 2$\pi$$r^{2}$ = 1$\times$$\pi$$r^{2}$ + 2$\times$$\pi$$r^{2}$ = (1+2)$\times$$\pi$$r^{2}$ = 3$\pi$$r^{2}$
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