PHYSICS

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A woman wantes to drive 83 km in 2 h. If she average 42 km/h for the first 1.27 h, what average velocity must she maintain for the remaining time in km/h

  • PHYSICS -

    42 * 1.27 = 53.34 in first hour
    so 83 - 53.34 = 29.66 km in second hour
    she has 2 - 1.27 = .73 hours left
    so she must do
    29.66 km / .73 hr = 40.63 km/hr

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