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Lv 5
? asked in Science & MathematicsMathematics · 1 decade ago

Mph math question (pls help)?

Michael drove to a friend's house at a rate of 40mi/h. He returned by the same route at a rate of 45mi/h. The driving time for the round trip was 4 h. What is the distance Michael traveled?

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  • nozar nazari
    Lv 7
    1 decade ago
    Favorite Answer

    D=40t=45T

    t+T=4

    40t=45(4-t)=180-45t

    85t=180

    t=180/45

    D=(180/45)(40)=160 miles

    God bless you.

  • Anonymous
    1 decade ago

    distance = x mils

    x/40 + x/45 = 4

    and solve for x

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