Question

Find the surface area of the figure below.
Radius 10 and base 21

A. 1949.77
B. 1947.79
C. 620
D. 523.14

Answer 1

do you have any figure?

Answer 2

first find the area of the top with the radius 10, use this pi x r^2

Answer 3

The answer Im getting isnt one of the choices and i dont know what im doing wrong and its super frustrating

Answer 4

i think 21 is not a base? based on the figure its the height

Answer 5

ok..soo?

Answer 6

is it an open cylinder or closed cylinder? or maybe open from 1 side only?

Answer 7

it must be the height.. surface area = 2 x (3.1416 x Radius2) + (2 x 3.1416 x Radius x Length)

Answer 8

SA=2(3.1416 x 10^2)+(2 x 3.1416 x 10 x 21)
SA=628.32 + 1319.472
SA=1947.79

So the answer is B.