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Average Speed of a Train for First 5 Hours Was 63kmph for next 3 hours was 58 km/hr and for the next 2 hours was 72 km/hr. What was the average speed of the train for the entire journey?
v(avg) = total displacement / total time
d1 = 63 km/hr • 5 hrs = 315 km
d2 = 58 km/hr • 3 hrs = 174 km
d3 = 72 km/hr • 2 hrs = 144 km
d(ttl) = 315 + 174 + 144 = 633 km
t(ttl) = 5 + 3 + 2 = 10 hrs
v(avg) = 633 km / 10 hrs = 63.3 km/hr
Answer – 63.3km/hr.
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