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

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

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

anonymous · Answer

do you have any figure?

anonymous · Answer

attachment

anonymous · Answer

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

anonymous · Answer

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

anonymous · Answer

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

anonymous · Answer

ok..soo?

shubhamsrg · Answer

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

anonymous · Answer

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

anonymous · Answer

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.