when D = 50 cm, d = 40 cm, and h = 55 cm
Find the total surface area of the figure shown here

Question

when D = 50 cm, d = 40 cm, and h = 55 cm
Find the total surface area of the figure shown here

anonymous · Answer

attachment

anonymous · Answer

I'll post the choices just in case 
 A) 4592 π square centimeters
 B) 5213 π square centimeters
 C) 5328 π square centimeters
 D) 5400 π square centimeters

anonymous · Answer

first find the sum of the inner and outer surface areas and then also of the two annular ends

anonymous · Answer

try to simplify
2*π *25*55 +2*π *20*55+π*(25*25 -20*20)

anonymous · Answer

is this formula right for the surface area of the cylinder 
S.A = $$2 \Pi r ^{2} + 2\Pi r h $$

anonymous · Answer

the above fromula is for the total surface area and 2Πrh for curved surface area...

anonymous · Answer

I got this for area the large cylinder  12560

anonymous · Answer

the cylinder looks hollow so it will be the total surface area of the whole( which is 4000pi) minus the total suface area of the hollow space(which is 3000pi) so the answer is 1000pi.

anonymous · Answer

yes I got this but it is not in the choices :(

anonymous · Answer

A) 4592 π square centimeters
 B) 5213 π square centimeters
 C) 5328 π square centimeters
 D) 5400 π square centimeters

anonymous · Answer

this is so confusing  :(

anonymous · Answer

than neither of the the choices are correct!  did you get the choices from a reliable source?

anonymous · Answer

yes I did

anonymous · Answer

thanks for trying though @Renato19  appreciate it :)

anonymous · Answer

maybe I'll send an email for my instructor or something and ask him

anonymous · Answer

i'll post it again  afterwards

anonymous · Answer

Good idea