SOLUTION: a space craft takes 4s for 42km, find its average speed

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Question 800731: a space craft takes 4s for 42km, find its average speed
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
a space craft takes 4s for 42km, find its average speed
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d = r*t
r = d/t