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Distance between 2 stations A & B is 1200 km. A train left the station 'A' at 9 am with a speed of 60 km/hr. After 1 hour 30 mins; another train started from the same station with a speed of 80 km/hr. At what time both trains will meet each other. Also find at what distance from station B, 2nd train will meet the 1st train?

Distance between 2 stations A & B is 1200 km. A train left the station 'A' at 9 am with a speed of 60 km/hr. After 1 hour 30 mins; another train started from the same station with a speed of 80 km/hr. At what time both trains will meet each other. Also find at what distance from station B, 2nd train will meet the 1st train? Correct Answer 3 pm; 840 km

Given:

Distance between 2 stations A & B is 1200 km. A train left the station 'A' at 9 am with a speed of 60 km/hr. After 1 hour 30 mins; another train started from the same station with a speed of 80 km/hr

Concept:

Relative speed

Calculation:

In 90 minutes distance travelled is 90 km

Relative speed of both trains = 20 kmph

Time taken to cover 90 km = 90/20 = 4 hour 30 minutes

total time after 9 am = 6 hour

Time = 3 PM

Distance covered = 6 × 60 = 360 km from A

Distance from B = 1200 - 360 = 840 km

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