New Click here to Enroll for SIDBI MSME Expert Classes by Experts

    Register

    Question

    Speed of current is equal to 20% of speed of boat in

    still water. If the boat takes 2 hours to cover 120 km in still water, then find the time taken by the boat to cover 72 km in upstream.
    A 5 hours Correct Answer Incorrect Answer
    B 6 hours Correct Answer Incorrect Answer
    C 1.5 hours Correct Answer Incorrect Answer
    D 7 hours Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    Speed of the boat in still water = 120 ÷ 2 = 60 km/h Speed of current = 60 × 0.20 = 12 km/h Therefore, upstream speed of the boat = 60 – 12 = 48 km/hr Required time taken = 72 ÷ 48 = 1.5 hours

    Practice Next