[tex]l = 2 \frac{1}{3} \: \: cm \\ r = 1 \frac{1}{2} \: \: cm \\ s _{bok} = \pi rl = \pi \times 2 \frac{1}{3} \times 1 \frac{1}{2} = \frac{7 \times 3\pi}{3 \times 2} = \\ \frac{7\pi}{2} = 3.5\pi = 10.996... = 11 \: \: cm {}^{2} [/tex]