- A6 cm
- B12 cm
- C3 cm
- D21 cm
Step-by-Step Solution
, so and cm. (12 comes from without halving; 21 is 30 − 9.)
Answer: A) 6 cm
A rectangle has perimeter 30 cm and length 9 cm. Using P = 2 × (l + b), what is its breadth?
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