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Q.

A train moving at a constant velocity of 54 km/hr moves east wards for 30 minutes, then due north with the same speed for 40 minutes. What is the average velocity of the train during this run? (in km/hr)

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a

35

b

38.6

c

49.3

d

30

answer is C.

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Detailed Solution

Vavg = total displacement (s) total time (t)=45×6070=38.6 km/hr
 

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