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B
21 dm
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C
2 m 5 dm
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D
2 m 50 dm
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Solution
The correct option is C 2 m 5 dm Perimeter = Sum of lengths of all the sides = 6 + 10 + 4 + 5 = 25 dm 10 dm = 1 m ⇒ Perimeter = 20 dm + 5 dm = 2 m 5 dm