A car moves towards north at a speed of 54 km/h for 1h. Then it moves eastward with same speed for same duration. The average speed and velocity of car for complete journey is:-
a) 54km/h,0
b) 15m/s, 15/(2)1/2m/s
c) 0,0
d) 0,54/(2)1/ 2km/h
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a is the answer ok ok ok ok ok ok
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