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goblinko [34]
3 years ago
15

It takes Serina 0.25 hours to drive to school. Her route is 21 km long. What is Serina’s average speed on her drive to school?

Physics
1 answer:
mario62 [17]3 years ago
7 0
Speed = distance / time = 21 / 0.25 = 84 Km/hr
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