Answers ( 5 )
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    When starting, the motorist goes in :

    60 : 20 = 3 ( hours)

    When to return, the motorist goes in :

    60 : 30 = 2 ( hours )

    In the entire trip, the motorist goes in :

     3 + 2 = 5 ( hours )

    Medium speed of the motorist for the entire trip :

    60 : 5 = 12 (  miles per hour )

    Answer : 12 miles per hour

    Vote for me ! ok

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    does your homework have this ? Strange very much ! hum

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    1, Shall i help you ? 

    2, Let's go to the zoo

    3, have your house any garden ? ( i don't sure )hum

    4,Must you get up early every day ?

    5, Nam is able to speak english very well.

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    what is "The product" ?, i don't understand ! hum

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    i don't understand ! lolang