New Prepare for NABARD 2025 exam - Based on last 4 year trend. March 5 at 5 PM. Register here

    Question

    The downstream speed of a boat is 75% greater than its

    upstream speed, and the speed of the stream is 3 m/s. How far can the boat travel in still water in 7.5 hours?
    A 280 km Correct Answer Incorrect Answer
    B 297 km Correct Answer Incorrect Answer
    C 310 km Correct Answer Incorrect Answer
    D 325 km Correct Answer Incorrect Answer
    E 338 km Correct Answer Incorrect Answer

    Solution

    Let the speed of boat in still water is y m/sec Then according to question (y+3) = 175% of (y-3) 4y+12 = 7y-21 3y = 33 Y = 11 m/sec Y = 11×18/5 km/hrs. = 198/5 km/hrs. boat can cover the distance in still water in 7.5 hours = 198/5 ×7.5 = 297 km

    Practice Next