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4r 10 h
i need help with surface area of a cylinder the question is 4 r and 10 h. i dont underrstand how to calculate it
radius=4 and height=10?
the surface of a cylindar is the circumferenceof the base times its height
c=2pi r 8pi in this case 8pi * 10 = 80pi for the sides
if you include the tops and bottoms you figure in for area
pi r^2 = area ; 4pi for the top and 4pi for the bottom for a total area of 88pi
4^2 = 16 not 4 .... 80+32 = 112 112pi
let me make sure i understand this befor you go please
4 X 4= 16 how did you get 8 pie
the edge of a circle equals: 2pi r , the sides of your cylinder are just the outside edge of a circle streched up to 10 right? 2pi (4) = 8pi 8pi (10) = 80pi that is the area of your sidewalls
im in the 7th grade and trying to understand im sorry
what do you have questions about?
i cant read your mind, no matter what grade your in :)
and you are good at it. thanks for your patience. so they way got the answer is 4X4=16 and then you added 4+4 =8 X 10 = 80 +32 = 112 X 3.14 = 351.68 correct
yes, that looks to be about right...
thank you so much i think i got it. you have been very helpfull to me. have a great weekend.
youre welcome :)