- A90 km
- B62.5 km
- C75 km
- D60 km
Step-by-Step Solution
By 8:30 A has gone 25 km; the remaining 125 km closes at 125 km/h in 1 h. So they cross at 9:30, when A has run 1.5 h × 50 = 75 km. (60 km ignores the half-hour head start.)
Answer: C) 75 km
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