New Enroll in RBI Grade B New Batch - Starts on May 21

    Question

    A train 275 metre long takes 33 sec to cross a man

    running at a speed of 5 km/hr in the direction same to that of train. What is the speed of the train?
    A 45 km/hr Correct Answer Incorrect Answer
    B 40 km/hr Correct Answer Incorrect Answer
    C 35 km/hr Correct Answer Incorrect Answer
    D 60 km/hr Correct Answer Incorrect Answer
    E 75 km/hr Correct Answer Incorrect Answer

    Solution

    Let the speed of the train be x Relative speed = (x - 5) km/hr ⇒ (x - 5) = (275 × 18)/(33 × 5) ⇒ (x - 5) = (4950)/(165) ⇒ x – 5 = 30 ⇒ x = 30 + 5 = 35 km/hr

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