Question

Please try to answer quickly my brainly app is crashing

Answer 1

The formula to calculate the lateral area of a cone is given by

$LA=pi*r*l$

where

LA=10.5pi in2

r=2.1 in

l=? slant height

substitute given values

$\begin{gathered} 10.5pi=pi*2.1*l \\ solve\text{ for l} \\ l=\frac{10.5pi}{pi*2.1} \\ \\ l=5\text{ in} \end{gathered}$

The answer is 5 inches