two train moving in same direction whose speed are 60 km/h and 90 km/h and length of each train is 60 m and 85 m respectively in which time they will meet each other
Answers
Step-by-step explanation:
relative speed =(90-60)=30km/h=25/3 m/s
the time they will meet =(60+85)=145×3/25
=17.4 sec
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Velocity of train 1 = 60km/h
Velocity of train 2 = 90 km/h
Distance to be covered by both trains to pass each other = 60+85
= 145km
Case 1 : Both trains are travelling in same direction
Relative velocity = 90 - 60 = 30km/h
Distance to be covered = 145km
Time taken = Distance / Velocity
= 145 / 30
= 4.83 hr
Case 2 : Both trains are travelling in opposite direction
Relative velocity = 90 + 60 = 120km/h
Distance to be covered = 145km
Time taken = Distance / Velocity
= 145 / 120
= 1.2 hr
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