Question

    The distance between two towns is covered in 9 hours at

    a speed of 60 kmph. By how much should the speed (in km/h) he increased so that 1 hour of the travelling time is saved?
    A 7.5 Correct Answer Incorrect Answer
    B 10 Correct Answer Incorrect Answer
    C 15 Correct Answer Incorrect Answer
    D 12.5 Correct Answer Incorrect Answer

    Solution

    Distance = 60 km/h × 9 hours = 540 km Find a new speed for 8 hours: new speed = 540/8 km/h= 67.5 km/h   Increase in speed- Increase = 67.5 km/h -60 km/h = 7.5 km/h  

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