who is good with surface are of prisms and cylinders?

Question

shane_b · Answer

What's the question?

anonymous · Answer

ill try my best to draw it since its a cylinder.

shane_b · Answer

Do you have the dimensions?  No need to draw it unless it's some odd looking cylinder

anonymous · Answer

height is 1 and i think it may be the base or radius is also 1.

anonymous · Answer

A.3.14
B.6.28
C.9.42
D.none of the above
are my choices for answers

shane_b · Answer

If it's just a normal cylinder the formula is just the circumference times the height:$$Surface~Area=2 \pi rh$$

shane_b · Answer

So based on the formula, the answer is ?

anonymous · Answer

none of the above?

shane_b · Answer

if r and h = 1, the answer must be 2 pi :)

shane_b · Answer

which is B

anonymous · Answer

ohhh okay thank you

anonymous · Answer

omg can you help me with my next question

shane_b · Answer

ok

anonymous · Answer

|dw:1340761711214:dw|

anonymous · Answer

it says the area is 15.6cm squared.what is the surface area

shane_b · Answer

This one should be pretty straightforward if you look at the image.  Do you know how to get the area of a triangle and rectangle?

anonymous · Answer

i dont remember

shane_b · Answer

$$A_{triangle}=\frac{1}{2}bh$$$$A_{rect}=L*W$$