2024 · Q55
Two trains A and B leave Delhi for Hyderabad at 7 : 00 a.m. and 7 : 50 a.m. on the same day and travel at 80 kmph and 100 kmph respectively. After how many kilometers from Delhi will the two trains be together?
Elementary MathematicsTime, Speed and Distance
- A200/3 km
- B100 km
- C400/3 km
- D1000/3 km
Explanation
By 7:50 a.m. train A has a head start of 80 × (50/60) = 200/3 km. B gains at 20 km/h, so it catches up after (200/3)/20 = 10/3 h. In that time B travels 100 × (10/3) = 1000/3 km from Delhi, option (d).