Area Problems
The circumferences of two concentric are 176 m and 132 m respectively. what is the difference between their radii?

44 meter
7 meter
8 meter
5 meter

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Area Problems
If the area of an equilateral triangle is x and its perimeter is y, then which one of the following is correct?

y2 = 432 x2
y4 = 432 x2
y4 = 216 x2
None of these

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