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A.
30cm\(^2\)
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B.
40cm\(^2\)
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C.
60cm\(^2\)
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D.
80cm\(^2\)
Correct Answer: Option B
Explanation
perimeter = 2( length + breadth)
→ 28 = 2 (10+ b)
14 - 10 = b
b = 4
Area = length x breadth
10 x 4 → 40cm\(^2\)
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