- A7:30 a.m.
- B7:45 a.m.
- C8:00 a.m.
- D7:40 a.m.
Step-by-Step Solution
Take the distance as 20 units: speeds 5 and 4 units/. By 6 a.m. the first has done 5 units, leaving 15, closed at 9 units/ in 40 min → 7:40 a.m.
Answer: D) 7:40 a.m.
A train leaves Lucknow at 5 a.m. and reaches Delhi at 9 a.m. Another leaves Delhi at 6 a.m. and reaches Lucknow at 11 a.m. When do they cross?
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