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

    Question

    A boat can travel 270 km downstream in 9 hours and 63 km

    upstream in 14 hours. Find the speed of the current.
    A 24.29 km/h Correct Answer Incorrect Answer
    B 18.25 km/h Correct Answer Incorrect Answer
    C 14.29 km/h Correct Answer Incorrect Answer
    D 12.75 km/h Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    ATQ, Let 'x' be the speed of the boat in still water and 'y' the speed of the current. On solving: 2x=34.5⇒x=17.25 km/hr Substitute back to find 'y': 30−17.25=y=12.75 km/hr Speed of the current = 12.75 km/hr

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