- A10 a.m.
- B11 a.m.
- C10:24 a.m.
- D11:24 a.m.
Step-by-Step Solution
By 8 a.m. the first train has covered 60 km, leaving 450 km. Closing speed 150 km/h → 3 h more → 11 a.m. (10:24 forgets the head start.)
Answer: B) 11 a.m.
Stations X and Y are 510 km apart. A train leaves X for Y at 7 a.m. at 60 km/h; another leaves Y for X at 8 a.m. at 90 km/h. At what time do they meet?
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