Question

    A woman travels at 50 km/h and is expected to reach her

    destination in 2 hours. However, after covering half the distance, she takes a 20-minute break. What speed must she maintain for the remaining journey to arrive on time?
    A 50 km/h Correct Answer Incorrect Answer
    B 72 km/h Correct Answer Incorrect Answer
    C 60 km/h Correct Answer Incorrect Answer
    D 48 km/h Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    Total distance = 50 × 2 = 100 km
    Time for half the journey = (100 ÷ 2) ÷ 50 × 60 = 60 minutes
    Time remaining = 120 – 60 – 20 = 40 minutes
    Required speed = (50 ÷ 40) × 60 = 75 km/h

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