"A closed cylinder has total surface area equal to 600 TT. Show that the volume, V cm^3, of this cylinder is given by V = 300 TT r - TT r ^3, where r cm is the radius of the cylinder.
Find the maximum volume of such a cylinder.
So far I've drawn a sketch and labelled the radius r.
600 = 2TTr^2 + 2TTrh
Im confused now
Thanks for any help
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- Thread Starter
- 19-01-2010 17:53
- 19-01-2010 18:19
what is volume of a cylinder (1) ?
what letter is missing from (1) in V = 300 TT r - TT r ^3,
do you have a way of replacing the extra letter using surface area?