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

    Question

    The speed of a boat in still water is 12 km/h and the

    speed of the current is 3 km/h. A person travels 270 kilometers in a boat in the upstream direction and returns to the starting point in the downstream direction. Find the time taken to cover the entire journey.
    A 48 Correct Answer Incorrect Answer
    B 32 Correct Answer Incorrect Answer
    C 24 Correct Answer Incorrect Answer
    D 16 Correct Answer Incorrect Answer

    Solution

    Let the speed of boat in still water =B and speed of stream =S B=12km/h, S= 3km/h Speed of the boat in upstream =B-S=9km/h Speed of the of the boat in Downstream =B+S =15km/h ATQ- Total time = (270/9 +270/15) =30+18=48hours.

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