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physics

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The Cedar Bluff express KAT bus averages 15 mph for 20 minutes, and then 32 mph for 14 minutes. What was its average speed? (mph)

  • physics -

    d = V1*t1 + V2*t21,
    d = 15 mi/h*(20/60)h + 32mi/h*(14/60)h,
    d = 5 + 7.5 = 12.5 Miles.

    t=20 min. + 14 min = 34 min = 0.567 h.

    V(ave) = d / t = 12.5 / 0.567 = 22.1 mi/h.

  • physics -

    thanks, I see where I messed up at...

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