- A120 km
- B80 km
- C0 km
- D40 km
Step-by-Step Solution
They meet at 9:12 a.m. and then move apart. By 10 a.m. they have run km together, which is 80 km beyond the 120 km gap → 80 km apart. (0 km assumes they are still level.)
Answer: B) 80 km
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