Khan/khan-exercises — Issue #7762: Solid geometry - mistake
Author: KhanBugz
Created: 2011-12-04 23:49:59+00:00
State: open
Labels: chrome, other, vista

Reporter: nadia.dolphins@gmail.com

i am just curious why at the end it says the total surface area is 16π + 16π + 56π = 88π i am curious why it has 2 16π where did the second one come from

[solid_geometry.html?seed=156&problem=cylinder-T](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/solid_geometry.html?seed=156&problem=cylinder-T&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/solid_geometry.html?seed=156&problem=cylinder-T&debug&activity=%5B%5B%22incorrect-activity%22%2C%22%5C%2247%CF%80%5C%22%22%2C140%5D%2C%5B%22hint-activity%22%2C%220%22%2C2%5D%2C%5B%22hint-activity%22%2C%220%22%2C54%5D%2C%5B%22hint-activity%22%2C%220%22%2C63%5D%2C%5B%22hint-activity%22%2C%220%22%2C63%5D%2C%5B%22hint-activity%22%2C%220%22%2C113%5D%5D)

["47π"]

Mozilla/5.0 (Windows NT 6.0) AppleWebKit/535.2 (KHTML, like Gecko) Chrome/15.0.874.121 Safari/535.2

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