Jamie made a wax model of a rolling pin of diameter 8 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

Jamie made a wax model of a rolling pin of diameter 8 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

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anonymous · Answer

attachment

anonymous · Answer

thank you can you help me  @bhaskar.pathk

anonymous · Answer

PLEASE!! lol

anonymous · Answer

surface area of cyllinder will be  pi r^2 H
where h is the hight of cyllinder ie 12 cm in your case

so surface area of Cyllindrical part will be 3.14 x 81 x 12

anonymous · Answer

okay

anonymous · Answer

surface area of  cone is  
1/3$$\pi \times r^2 \times h$$

where according to your question h will be $$\sqrt{5^2 - 4^2 }$$

anonymous · Answer

is that it?

anonymous · Answer

sorry  in 1st case radious will be 4 cm so 

suface area will be  3.14 x 16 x 12  --- $$\pi \times r^2 \times  h$$

anonymous · Answer

okay

anonymous · Answer

given that diameter is  8 cm

do you got how i taken the height of cone

damm intrnet i too slow for me today...so it may be  confusing for you

anonymous · Answer

no

anonymous · Answer

and its okay

anonymous · Answer

enjy with  Os  as it aim to solve your problem Rather than Givin you answer..