differentiation help please please please asap

what's up guys
im kinda stuck on this question i don't really understand it and in the answer what is even h stand for and what is 2pierh is for pleaaaase help and explain it to me
thanx people
and bless

(edited 13 years ago)

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Reply 1

StephenP91

...What?

Ah, I see. The question wasn't there when I looked.

(edited 13 years ago)

Reply 2

Phobia27

h is the height of the cylinder :colonhash:

Reply 3

icapturethecastle

h - height
2 pi r h = 2 x pi x radius x height = surface area of cylinder

Reply 4

ketchup

Original post by icapturethecastle

h - height
2 pi r h = 2 x pi x radius x height = surface area of cylinder

oh thanx also why do you times it by 2 theres only 1 circumfrence on the cylender right?
but i get the rest like 2pie r 2 because theres 2 circles in the cylender but just the 2 pie r h why isit timesed by 2
thanx for making it clearer