## Elementary Geometry for College Students (5th Edition)

= 648 $\pi$ $cm^{2}$ $\approx$ 2035.8 $cm^{2}$
Base area = $\pi$ $r^{2}$ Base area = 144 $\pi$ $cm^{2}$ Lateral area = 2 $\times$ $\pi$ $\times$ r $\times$ h Lateral area = 2 $\times$ $\pi$ $\times$ 12 cm $\times$ 15 cm Lateral area = 360 $\pi$ $cm^{2}$ Total area = 2 $\times$ base area + lateral area Total area = 2 $\times$ 144 $\pi$ $cm^{2}$ + 360 $\pi$ $cm^{2}$ Total area = 648 $\pi$ $cm^{2}$ $\approx$ 2035.8 $cm^{2}$