With an average speed of 40 kmph, a train reaches its destination in time. If it goes with an average speed of 35 kmph, it is late by 15 minutes. the length of the total journey is:
A. 40 km
B. 70 km
C. 30 km
D. 80 km
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Ratio of The Average Speed = 40 : 35 = 8 : 7.
So, Ratio of the Time Taken = 7 : 8.
Difference In Time = 15 min
8 - 7 = 15
1 = 15
Thus,
8 = 8 * 15 = 120 Minutes.
Second Train Takes 120 minutes (2 hours) to reach there.
Distance = 35 * 2 = 70 Km.