Question
A circle has radius 7 cm. Which of the following is its circumference, in terms of π?
A) 7π cm B) 14π cm C) 49π cm D) 28π cm
Mark scheme (1 mark):
- B1: B (14π cm). C = 2πr = 2 × π × 7 = 14π cm.
- Common error: choosing 49π (that is the area, πr²).
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Generated by TopMyGrade AI · cross-check official sources before relying on the mark-scheme phrasing.