Question

Please help me with this one

Answer 1

Answer:

$SA=48\pi\ ft^2$

$SA=150.72 ft^2$

Step-by-step explanation:

we know that

The surface area of a cone is given by the formula

$SA=\pi r^{2}+\pi rl$

where r is the radius of the base of cone

l is the slant height

we have

$r=8/2=4\ ft$ ---> because the radius is half the diameter

$l=8\ ft$

substitute

$SA=\pi (4)^{2}+\pi (4)(8)$

$SA=48\pi\ ft^2$ ----> exact value

assume

$\pi =3.14$

$SA=48(3.14)=150.72 ft^2$ ----> approximate value