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posledela
3 months ago
5

Alana is skateboarding at 19 km/h and throws a tennis ball at 11 km/h to her friend Oliver who is behind her leaning against a w

all. What is the speed of the tennis ball if someone was watching the exchange on the sidewalk?
Physics
1 answer:
Softa [3K]3 months ago
7 0

Answer: 11 km/h

Explanation:

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