What is the length of a rectangle if its breadth is 6 cm and its perimeter is 30 cm?

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• A 5 cm
• B 12 cm
• C 9 cm
• D 18 cm

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Answer: C. 9 cm

Perimeter = 2 × (length + breadth), so 30 = 2 × (length + 6). length + 6 = 15, so length = 9 cm.

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