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A golfer rides in a golf cart at an average speed of 3.10 m/s for 29.0 s. She then gets out of the cart and starts walking at an average speed of 1.40 m/s. For how long (in seconds) must she walk if her average speed for the entire trip, riding and walking, is 2.20 m/s?

  • physics -

    avg speed= distance/total time

    distance=3.1*29 m+1.4*t

    solve for t.

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