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    Question

    A boat traveled 100 km downstream. The boat's speed in

    still water is 30 km/h, and the stream's speed is 10 km/h. Calculate the time required for the boat to cover this distance.
    A 2.5 hours Correct Answer Incorrect Answer
    B 3 hours Correct Answer Incorrect Answer
    C 3.5 hours Correct Answer Incorrect Answer
    D 4 hours Correct Answer Incorrect Answer

    Solution

    Speed downstream = 10 + 30 = 40km/hr Distance = 100 kms ATQ; Required time = 100/(10 + 30) = 2.5 hrs Hence, option a.

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