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Squares and Rectangles (
Posted on 20040121
)
There is a grid of 20 squares by 10 squares. How many different rectangles are possible?
(Note that square is a rectangle).
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Submitted by
Ravi Raja
Rating:
2.0000
(5 votes)
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Solution
 Comment 1 of 20
This is simple, there are (21*20)/2 ways to choose the lines for the top and bottom and (11*10)/2 ways to choose the lines for the sides.
21*20*11*10/4 = 11550
Posted by
Brian Smith
on 20040121 09:22:00
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