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January 28, 2015

January 28, 2015

Posted by **Cindy** on Tuesday, June 16, 2009 at 9:54pm.

I know it's the sum of an arithmetic sequence, but I'm not sure exactly what to do.

- trigonometry -
**drwls**, Tuesday, June 16, 2009 at 10:20pmThe highest row has 6 cans

The lowest row (29 rows down from the top) has 6 + (29*4) = 122 cans

The average number in a row is (122+6)/2 = 64 cans.

The total number of cans is 30x64 = 192

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