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Answer:
Average speed =48 km/h
Average velocity =0
Explanation:
Total distance = d + d = 2d
Time taken = (d/60) + (d/40) = 0.04167 d
Average speed = total distance/ total time taken
Average speed = 2d/0.04167d = 48 km/h
Net displacement = 0 (zero) [from point A to A]
Therefore Average velocity = 0 km/h
Hope it helps!
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