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Answer:
displacement = 43.5 km
Explanation:
displacement = velocity * time taken
Here speed is 87 km/hr, which is given in km per hour
So we need to change the given time to hours:
60 minutes = 1 hours
30 minutes = 0.5 hours
Then using the formula lets find displacement:
displacement = velocity * time taken
displacement = 87 km/hr * 0.5
displacement = 43.5 km