Question

Помогите пожалуйста 2и 3 номер

Answer 1

#2.

a) $V_{c} = \frac{4}{3} \pi r^3$; $V = \frac{\pi * 6^3*4}{3} = \pi * 36 * 3 * 4 = 432\pi$ см³

$S_c = 4\pi R^2 = 4 * \pi * 36 =$ $144\pi$ см²

$D_c = 2R = 2 * 6 = 12$ см

б) $(x + 3)^2 + (y - 7)^2 + (z - 9)^2 = 36$

#3.

$l_{o6p} = h = 10$ см

$V = S_{OCH} * h = \pi R^2 * h = \pi *1 * 10 = 10\pi$ см³

$S_{6ok} = 2\pi Rh = \pi * 1 * 2 * 10 = 20\pi$ см²

$S_{n} = S_{6ok} + 2S_{o} = 20\pi + 2*1\pi = 22\pi$ см²