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GMAT Math Practice Test #1

Category - Math

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If width of a rectangle is increased by 10% and the length is decreased by 20%, by what percent does the area decrease?

Explanation

Answer B

Original area = a x b Revised area = 1.1a x 0.8b = 0.88ab
Decrease in area = 0.12 = 12%

Key takeaway: The word problems based on basic geometry are easy to tackle if you remember simple formulae ( perimeter, area ) of rectangle, square, circle etc. and their applications.

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GMAT Math Practice Test #1

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GMAT Math Practice Test #1

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