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    Question

    Ram covers first 45 km at the speed of 15 km/hr. He

    covers next 40 km at the speed of 20 km/hr. He covers next 60 km at the speed of 30 km/hr. What is the average speed of Ram?
    A 145/7 km/hr Correct Answer Incorrect Answer
    B 121/9 km/hr Correct Answer Incorrect Answer
    C 83/3 km/hr Correct Answer Incorrect Answer
    D 96/5 km/hr Correct Answer Incorrect Answer

    Solution

    ATQ, Total distance covered = 45 + 40 + 60 = 145 km Total time = (45/15) + (40/20) + (60/30) = 7 hr ∴ Average speed = 145/7 kmph

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