Question

what is the formula of CSA and TSA of cube , cuboid andother important figures

Answer 1

$TSA\:of\:cylinder=2\pi rh +2\pi r^{2}\\TSA\:of\:hemisphere=3\pi r^{2}\\TSA\:of\:sphere=4\pi r^{2}\\TSA\:of\:cone=\pi r(r+l)\:\:or \:\:\pi rl + \pi r^{2}\\TSA\:of\:cube=6s^{2}\\TSA\:of\:cuboid=2(lb+lh+bh)\\\\CSA\:of\:cylinder=2\pi rh\\CSA\:of\:hemisphere=2\pi r^{2}\\CSA\:of\:sphere=4\pi r^{2} (same\:as\:TSA\:of\:sphere)\\CSA\:of\:cone=\pi rl\\CSA\:of\:cube=4s^{2}\\CSA\:of\:cuboid=2(lb+bh)$