Question

Height of the cone is 12 cm and radius of it's base is 9 cm ,then slant height of the cone is ​

Answer 1

Answer:

$15 \: \: \: cm$

Step-by-step explanation:

$l = \sqrt{ {12}^{2} + {9}^{2} } \\ \\ = \sqrt{144 + 81} \\ \\ = \sqrt{225} \\ \\ = 15 \: \: \: cm.$