GMAT Quantitative Reasoning Practice Test 2

Question : 37 of 100

Marks: +1, -0

{\A}

and

{\B}

are two circles. The radius of

{\A}

is twice as large as the diameter of

{\B}

. What is the ratio between the areas of the circles?

Solution:

The radius of circle

A

is 4 times larger than the radius of circle

B

. The area of a circle is a function of the radius squared, therefore the area of radius

A

is 16 times bigger.

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