SOLUTION: A plane has a velocity relative to the air of 500 km/hr. It has a constant tail wind of 200 km/hr. How long will it take to cover 2100 km over the ground?

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Question 807921: A plane has a velocity relative to the air of 500 km/hr. It has a constant tail wind of 200 km/hr. How long will it take to cover 2100 km over the ground?
Answer by rfer(16322) About Me  (Show Source):
You can put this solution on YOUR website!
2100/(500+200)=3hrs