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Verified Answer :

u=32km/hr
v=54km/hr
t=8s

u= 321000/3600= 80/9 m/s
v= 541000/3600= 15 m/s

acc = change in velocity / time taken
acc= final velocity - initial velocity / time taken
acc= 15-80/9 m/s / 8s
acc= 55/72 m/s

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