the dimensions of a 7 -cm by 2 -cm rectangle are multiplied by 3 . how is the area affected ?

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UniqueR UniqueR

24-04-2017
Mathematics

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the dimensions of a 7 -cm by 2 -cm rectangle are multiplied by 3 . how is the area affected ?

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BackPacker99 BackPacker99 · Answer 1 · 2017-04-24T22:18:10+02:00

Let's figure this out by first finding the dimensions of the original rectangle, and then finding the dimensions of the new rectangle.

Original rectangle: Since the area of a rectangle is the length * width, the area of this rectangle is 7 * 2 = 14 square cm.

New rectangle: The new dimensions of this are 7*3 = 21 cm by 2*3 = 6 cm. To find the area, we multiply these two together. 21*6 = 126 square cm.

126 is 9 times greater than 14, so the area will be multiplied by 9.