Question
A circular pond has diameter 9.4 m. Calculate its area, giving your answer correct to 3 significant figures.
Mark scheme (2 marks):
- M1: r = 9.4 ÷ 2 = 4.7 m, then A = π × 4.7² = π × 22.09
- A1: 69.4 m² (accept 69.3–69.4 depending on rounding chain)
- Penalty: missing units −0; using d² instead of r² scores 0.
2 marks · take your time before peeking.
Sign up to try the next 30 problems
Save your streak, mark answers against the spec, and build a daily revision habit. Free during public beta — no card, no auto-renew.
Generated by TopMyGrade AI · cross-check official sources before relying on the mark-scheme phrasing.