UP TGT Mathematics Commercial Mathematics Test Series - Part 4
Two trains 120 m and 180 m long are running in opposite directions on parallel tracks at speeds of 40 km/h and 50 km/h....
Type: MCQ • Marks: 1
Two trains 120 m and 180 m long are running in opposite directions on parallel tracks at speeds of 40 km/h and 50 km/h. How long will they take to cross each other?
Options
A. 1) 10
B. 2) 18
C. 3) 15
D. 4) 12
Explanation
Relative speed = 40 + 50 = 90 km/h = 90 * (5/18) = 25 m/s. Total distance = 120 + 180 = 300 m. Time = 300 / 25 = 12 seconds.
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