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    andrew32's Avatar
    andrew32 Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Jan 18, 2010, 08:58 PM
    How to find average speed with given speed and distance
    Suppose you go 75 mph for 53 miles, 55 mph for 21 miles and 35 mph for 3 miles... what is your average speed?
    jaysie90's Avatar
    jaysie90 Posts: 44, Reputation: 3
    Junior Member
    		  
    #2

    Jan 18, 2010, 09:33 PM

    You might want to get a second opinion, but this is how I figure it:
    Multiply each speed by the distance
    75mph X 53m
    55mph X 21m
    35mph X 3m
    Then add each of the products together = 5235
    Then divide that by the number of miles traveled = 77
    5235/77=67.987
    Average speed = 68mph
    smearcase's Avatar
    smearcase Posts: 2,392, Reputation: 316
    Ultra Member
    		  
    #3

    Jan 19, 2010, 12:12 PM

    I would compute the time for each speed, then add up total time used.
    Then, divide total distance by total time. All based on: Distance equals Rate times Time.
    krishnakk's Avatar
    krishnakk Posts: 7, Reputation: -1
    New Member
    		  
    #4

    Oct 11, 2010, 12:34 AM
    Multiply each speed by the distance
    75mph X 53m
    55mph X 21m
    35mph X 3m
    Then add each of the products together = 5235
    Then divide that by the number of miles traveled = 77
    5235/77=67.987
    Average speed = 68mph

    HOPE THAT HELPS YOU!
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