Question 1
SEAMO self-study edition 2027; not an official 2027 paper. Original source years are retained. 25 questions, 90 minutes; Q1–10: 3 points, Q11–20: 4 points, Q21–25: 6 points, total 100. Original response types and all subparts are preserved. Verified is an editorial convention; source defects, necessary assumptions and unresolved mathematical uncertainty are disclosed.
Mr Tan drove from Town A to Town B at a constant speed of 40 km/h. He returned from B to A at 70 km/h. The whole journey took $5\frac12$ hours. Find the distance between the towns in km.
Mr Tan drove from Town A to Town B at a constant speed of 40 km/h. He returned from B to A at 70 km/h. The whole journey took $5\frac12$ hours. Find the distance between the towns in km.