Time and Distance

Discussion in 'Calculator Requests' started by Aniketh Sudunagunta, Feb 26, 2017.

  1. Aniketh Sudunagunta

    Aniketh Sudunagunta New Member

    charlie leaves home going 40 miles per hour. When charlie is 9 miles from home, Danny starts after charlie from the same place, going 55 miles per hour. How long does it take Danny to catch up charlie?
     

  2. math_celebrity

    math_celebrity Administrator Staff Member

    Let h be the number of hours that pass when Charlie starts. We have the following equations:
    • Charlie: D = 40h + 9
    • Danny: D = 55h
    Set them equal to each other:
    40h + 9 = 55h

    Subtract 40h from both sides:
    15h = 9
    h = 3/5

    3/5 of an hour = 3(60)/5 = 36 minutes
     

  3. Aniketh Sudunagunta

    Aniketh Sudunagunta New Member

    Thank you so much
     
    math_celebrity likes this.

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