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Q.
Two goods trains each 520 m long, are running in opposite directions on parallel tracks. Their speeds are 42 km/hr and 36 km/hr respectively. Find the time taken by the slower train to cross the driver of the faster one ?
A.
60 sec
B.
48 sec
C.
45 sec
D.
34 sec
View Answer
Correct choice: B
Explanation:
Relative speed = 42 + 36 = 78 km/hr = 65/3 m/s Distance = (520 + 520) =1040 mts. Time = 1040× 3/65= 48 sec
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