Question

    Train 'P' travels at a speed of 45 km/h and crosses

    train 'Q' in 15 seconds while moving in opposite directions. Determine the speed of train 'Q' if the lengths of trains 'P' and 'Q' are 120 m and 150 m, respectively.
    A 12.5 km/h Correct Answer Incorrect Answer
    B 18.5 km/h Correct Answer Incorrect Answer
    C 19.8 km/h Correct Answer Incorrect Answer
    D 22.5 km/h Correct Answer Incorrect Answer

    Solution

    ATQ,

    Let the speed of train Q = x km/h According to the question, (45 + x) × 5/18 = (120 + 150)/15 (45 + x) × 5/18 = 18 45 + x = 64.8 x = 19.8 km/h

    Practice Next