Khan/khan-exercises — Issue #7894: Rate problems 1 - Stuck
Author: KhanBugz
Created: 2011-12-06 08:52:24+00:00
State: open
Labels: chrome, hard, win7

I can't figure out how to get Time of Car. I thought id plug it into tc=dc/19 but that does not work.
I have no idea how to get 274.
This is sad, i'm about to be in calculus and I can't solve a simple rate problem.

[rate_problems_1.html?seed=86&problem=2](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/rate_problems_1.html?seed=86&problem=2&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/rate_problems_1.html?seed=86&problem=2&debug&activity=%5B%5B%22hint-activity%22%2C%220%22%2C1688%5D%2C%5B%22hint-activity%22%2C%220%22%2C1689%5D%2C%5B%22hint-activity%22%2C%220%22%2C1690%5D%2C%5B%22hint-activity%22%2C%220%22%2C1714%5D%2C%5B%22hint-activity%22%2C%220%22%2C1716%5D%2C%5B%22hint-activity%22%2C%220%22%2C1717%5D%2C%5B%22hint-activity%22%2C%220%22%2C1717%5D%2C%5B%22hint-activity%22%2C%220%22%2C1718%5D%2C%5B%22hint-activity%22%2C%220%22%2C1726%5D%5D)

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Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/535.2 (KHTML, like Gecko) Chrome/15.0.874.121 Safari/535.2

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