Help? Find the surface area of the cylinder in terms of pi. the cylinder is 14cm across and 18 cm in height.

Question

Help?  Find the surface area of the cylinder in terms of pi.  the cylinder is 14cm across and 18 cm in height.

jhonyy9 · Answer

do you know what is the formula for surface area of a cylinder ?

jhonyy9 · Answer

how do you think what sign that the cylinder is 14 cm across ?

jhonyy9 · Answer

what is this 14 cm ?
- and if you know this how many will be the ardius of base of cylinder ?

jhonyy9 · Answer

radius of base - sorry

anonymous · Answer

the 14cm is the diameter...so i assume the radius would be 7cm?

jhonyy9 · Answer

yes right 
 so than how you calcule the surface area ?

anonymous · Answer

i have no idea, i am trying to help my daughter with geometry and this is so far beyond me

jhonyy9 · Answer

- so the surface area is lateral area assumed with 2 time the base area (down and up )
- yes ?

anonymous · Answer

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yup, diameter is 14cm
cylinder surface area
=area of the 2 circle(top and bottom)+area of the side surface
=2(pi *r^2)+ 2pi *r*h
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