Posted by coach on Tuesday, November 15, 2011 at 9:40am.
A rectangle measures 30 feet by 20 feet and has a post at each corner. If posts are placed 2 feet apart. How many posts will there be in all?

math  lizzykaynat, Tuesday, November 15, 2011 at 11:52am
You would need 34 posts. I drew this out and then added up each post. Note that some of the posts will be less than two feet apart because there has to be a post on each corner.

math  tchrwill, Wednesday, November 16, 2011 at 11:32am
Ignoring the corner posts, there are 14 posts along each long side, 9 posts along each short side and the 4 corner posts for a total of 2(14) + 2(9) + 4 = 50
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