A 727 jet needs to attain a speed of 200 mph to take off. If it can accelerate from 0 to 200 mph in 30 seconds, how long must the runway be? (Assume constant acceleration)

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  1. average speed during takeoff = 100 mph
    so 100 mph for 30 seconds

    100 m/hr *1 hr/3600 seconds *30 seconds
    = .833 mles

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