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    Question

    If a man rides a bicycle at a speed of 50 km/h for 2

    hours and at a speed of 40 km/h for the next 4 hours then what will be the average speed? 
    A 62.40 km/h Correct Answer Incorrect Answer
    B 46.23 km/h Correct Answer Incorrect Answer
    C 43.33 km/h Correct Answer Incorrect Answer
    D 54.32 km/h Correct Answer Incorrect Answer

    Solution

    Given:  Time = 2 hours & Speed = 50 km/h Distance = Speed × Time = 50 × 2 = 100 km Time = 4 hours & Speed = 40 km/h Distance = Speed × Time = 40 × 4 = 160 km Total Distance = 100 km + 160 km = 260 km Total Time = 2 hours + 4 hours = 6 hours Average Speed = Total Distance / Total Time = 260 km / 6 hours = 43.33 km/h

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