major help please

Andre made a wax model of a rolling pin of diameter 4 cm. The rolling pin was shaped like a right circular cylinder with a right circular cone at each end as shown below.

What was the total surface area of the rolling pin? Using complete sentences, describe the steps you used to calculate the surface area.

Question

major help please 
 
Andre made a wax model of a rolling pin of diameter 4 cm. The rolling pin was shaped like a right circular cylinder with a right circular cone at each end as shown below.
 


What was the total surface area of the rolling pin?  Using complete sentences, describe the steps you used to calculate the surface area.

anonymous · Answer

attachment

dumbcow · Answer

lateral surface area equations
cylinder:
$$SA = 2\pi r*h$$
cone:
$$SA = \pi r*l$$

dumbcow · Answer

radius = 2
height = 13
slant height = 7

anonymous · Answer

ok.. ;/

anonymous · Answer

so you do one multiply it by two then do the cylindar

dumbcow · Answer

correct, you need surface area of 2 identical cones and the cylinder

dumbcow · Answer

total surface area will then be:
$$2 \pi r*h + 2 \pi r*l = 2 \pi r(h+l)$$

anonymous · Answer

does it matter if its a right circular cylindar

dumbcow · Answer

no it doesn't matter...it works for all cylinders

anonymous · Answer

@dumbcow can you please just concentrate it into an answer.

anonymous · Answer

251.33cm^2