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The length of a certain rectangle is increased by 20% and its width is increased by 30%. Then its area is increased
by how much?

 Dec 3, 2019
 #1
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1.2 x 1.3 = 1.56       it's area is increased by 56 %

 Dec 3, 2019
 #2
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Another solution is too plug in easy numbers to work with into the sides of the rectangle. Compute the oringinal area and the changed area, and calculate the percentage.laugh

 Dec 3, 2019

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