Area Problems
If the base of a rectangular is increased by 10% and the area is unchanged , then the corresponding altitude must to be decreased by?

10%
91/11 %
111/9 %
11%

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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?

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

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