Khan/khan-exercises — Issue #6998: Solid geometry - answer is wrong
Author: KhanBugz
Created: 2011-11-24 01:24:32+00:00
State: open
Labels: firefox, win7, wrong-or-unclear

Reporter: wilsonmferreira@gmail.com

the area of the top is "4 pi"
the area of the bottom is "4 pi"
the area of the side is "28 pi"

the total area is "36 pi", not "28 pi"

[solid_geometry.html?seed=114&problem=cylinder-V](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/solid_geometry.html?seed=114&problem=cylinder-V&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/solid_geometry.html?seed=114&problem=cylinder-V&debug&activity=%5B%5B%22incorrect-activity%22%2C%22%5C%2236pi%5C%22%22%2C78%5D%2C%5B%22incorrect-activity%22%2C%22%5C%2236%20pi%5C%22%22%2C6%5D%2C%5B%22incorrect-activity%22%2C%22%5C%2236%20pi%5C%22%22%2C188%5D%2C%5B%22hint-activity%22%2C%220%22%2C4%5D%2C%5B%22hint-activity%22%2C%220%22%2C8%5D%5D)

["36pi","36 pi","36 pi"]

Mozilla/5.0 (Windows NT 6.1; WOW64; rv:8.0.1) Gecko/20100101 Firefox/8.0.1

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