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Question

If each side of a square of side a is tripled, what is the area of the new square formed?

A
a2
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B
4a2
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C
9a2
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D
12a2
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Solution

The correct option is C 9a2
Given:
Side of square = a
Since the sides are tripled, then each side will be 3a.
Since we know that area of square of side a is given by
Area = a×a=a2
Area of the square of side 3a will be:
Area = 3a×3a=9a2

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