Question

    A person crosses a 900-metre long street in 6 minutes.

    The speed of the person, in km/h, is:
    A 10 Correct Answer Incorrect Answer
    B 9 Correct Answer Incorrect Answer
    C 5 Correct Answer Incorrect Answer
    D 8 Correct Answer Incorrect Answer

    Solution

    Length of the street = 900 m = 0.9 km Time = 6 min = (6/60) = 1/10 hours Required speed = Distance/Time = (0.9/1/10) km/h   ⇒ (0.9 x 10) km/h ⇒ 9 km/h The speed of the person is 9 km/h.

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