I have a sheet of paper with a grid drawn on it, filling the whole paper. This grid has 4 rows and 9 columns, forming 36 congruent rectangles. Also, each of these rectangles is similar in proportion to the whole sheet.

If the sheet is 15 inches wide, how long is it?

The rectangles are similar to the whole sheet but must be oriented the other way.  If the height is X then (15/9) : (X/4) = X : 15 which makes X=10.

Posted by Richard on 2004-03-22 13:31:52