Khan/khan-exercises — Issue #7120: Solid geometry - Solid Geometry - Acceptable Answer Formats
Author: KhanBugz
Created: 2011-11-27 11:40:10+00:00
State: open
Labels: firefox, other, snowleo

Problem:
What is the surface area of a cylinder with base radius 4 and height 5?

Acceptable Answer Formats:
a multiple of pi, like 12 pi or 2/3 pi

Expected Behaviour:
"72 pi" should be correct.

Actual Behaviour:
"72 pi" is wrong, while "72pi" is right.

Suggested Fix:
Display "π" next to the input box to reduce confusion, make "72" correct answer.

[solid_geometry.html?seed=50&problem=cylinder-T](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/solid_geometry.html?seed=50&problem=cylinder-T&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/solid_geometry.html?seed=50&problem=cylinder-T&debug&activity=%5B%5B%22incorrect-activity%22%2C%22%5C%2272%20pi%5C%22%22%2C46%5D%2C%5B%22hint-activity%22%2C%220%22%2C2%5D%2C%5B%22hint-activity%22%2C%220%22%2C4%5D%2C%5B%22hint-activity%22%2C%220%22%2C5%5D%2C%5B%22hint-activity%22%2C%220%22%2C6%5D%5D)

["72 pi"]

Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:8.0.1) Gecko/20100101 Firefox/8.0.1

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