Question

    The speed of current is 25 km/hr. If the speed of the

    boat in still water had been 5 km/hr more than the original speed, then it would take 4 hours to cover 240 km in downstream. Find the original speed of the boat in still water (in km/hr).
    A 17 km/hr Correct Answer Incorrect Answer
    B 27 km/hr Correct Answer Incorrect Answer
    C 30 km/hr Correct Answer Incorrect Answer
    D 22 km/hr Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    ATQ, Let the speed of the boat in still water be ‘x’ km/hr. According to the question, (x + 5 + 25) = 240 / 4 Or, x + 30 = 60 So, x = 60 - 30 = 30 km/hr

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