Question 2 • Grade 7 Mathematics
Round each lap time to the nearest whole second: 56.6 → 57, 57.9 → 58, 57.5 → 58, 65.3 → 65, and 65.7 → 66. Adding the rounded times gives 57 + 58 + 58 + 65 + 66 = 304 seconds, so the estimated total is 304 seconds.
AI-written and checked against the verified answer.