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    Question

    Rekha travels 50 km at 25 km/h by cycle, 100 km at 50

    km/h by car, and the remaining 8 km on foot at 4 km/h. Find her average speed for the whole journey. (Rounded off to 2 decimal places)
    A 6.33 km/h Correct Answer Incorrect Answer
    B 16 km/h Correct Answer Incorrect Answer
    C 11.48 km/h Correct Answer Incorrect Answer
    D 26.33 km/h Correct Answer Incorrect Answer

    Solution

    Total Distance = 50 km + 100km+8km =158 km   Time taken by cycle = 50 km/25km/h = 2 hours   Time taken by car = 100 km/50km/h = 2 hours   Time taken on foot = 8 km /4km/h = 2 hours   Total Time= 2+2+2= 6 hours   Average Speed = 158 km/6 hours = 26.33 km/h

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