📢 Too many exams? Don’t know which one suits you best? Book Your Free Expert 👉 call Now!


    âš¡ Month End Offer - Flat 52% Off On All Courses! Enroll Now âš¡
    00:00:00 AM Left

    Question

    A boy can swim a certain distance downstream in 4 hours

    and return in 7 hours. If the rate of stream is 6 kmph then what is the speed of boy in still water?
    A 24 kmph Correct Answer Incorrect Answer
    B 20 kmph Correct Answer Incorrect Answer
    C 27 kmph Correct Answer Incorrect Answer
    D 22 kmph Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    Let the speed of the boy in still water be x kmph. Then, (x + 6) × 4 = (x – 6) × 7 => 4x + 24 = 7x - 42 => 3x = 66 => x = 22 kmph

    Practice Next

    Relevant for Exams:

    ask-question