SOLUTION: The length of a rectangle is increased by 30% and its width is decreased by 10%. This increases the area by ?

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Question 136134: The length of a rectangle is increased by 30% and its width is decreased by 10%.
This increases the area by ?
Answer by solver91311(24713) About Me  (Show Source):
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The area is the length times the width. So if the width of the original rectangle is W and the length is L, then the width of the new rectangle is .9W and the length of the new rectangle is 1.3L. Therefore the area of the new rectangle is (1.3L)(.9W) = 1.17LW. The area is increased by a factor of 1.17.