Question

    Reshma travels 30 km at 10 km/h by cycle, 90 km at 45

    km/h by car, and the remaining 5 km on foot at 5 km/h. Find her average speed for the whole journey. (Rounded off to 2 decimal places)
    A 5.83 km/h Correct Answer Incorrect Answer
    B 10.48 km/h Correct Answer Incorrect Answer
    C 20.83 km/h Correct Answer Incorrect Answer
    D 14.36 km/h Correct Answer Incorrect Answer

    Solution

    Total Distance = 30 km +90 km 5 km =125 km   Time taken by cycle = 30 km/10km/h = 3 hours   Time taken by car = 90 km/45 km/h = 2 hours   Time taken on foot = 5 km/5km/h = 1 hour   Total Time =3+2+1= 6 hours   Average Speed = 125 km/6 hours = 20.83 km/h

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