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?

(In reply to Solution by Federico Kereki)

Hmmm....

This gets down to a definition of width and length.  Actually the question called for "width and height", rather than "length", changing the emphasis somewhat.   When width is contrasted with length, we think of the width as the shorter dimension, but when width is contrasted with height, we think of the width as whichever one was horizontal, while height is vertical, regardless of which dimension is smaller or larger.

Gamer indicates 4 rows and 9 columns, indicating that the division by four is vertical (separated by horizontal lines) and the nine is horizontal (separated by vertical lines).  If the width stretches across the columns and the width is 15, then the height is 10, as another previous post indicated.

Posted by Charlie on 2004-03-22 15:21:37