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Mathematics

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A motorist do does the first part of his journey at an average speed of 54km/h. Then he increases the speed to 60km/h for the rest of the journey. If he travels 225km in 4 hours, what is the distance traveled for the rest of his journey? show clear steps.

  • Mathematics - ,

    54 T1 + 60 T2 = 225 (km)
    T1 + T2 = 4 (hours)
    54 T1 + 54 T2 = 216
    6 T2 = 9
    T2 = 1.5 hours
    T1 = 2.5 hours
    60 T2 = 90 km is travelled at the higher speed.

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