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    Question

    A car travels from point A to point B in 4 hours,

    covering a distance of 180 km. On the return journey, the speed is reduced by 20%. How much time does the car take to travel from point B to point A?
    A 4.8 hours Correct Answer Incorrect Answer
    B 5 hours Correct Answer Incorrect Answer
    C 5.2 hours Correct Answer Incorrect Answer
    D 5.5 hours Correct Answer Incorrect Answer
    E 6 hours Correct Answer Incorrect Answer

    Solution

    Speed on the way from A to B = Distance / Time = 180 / 4 = 45 km/h. Reduced speed for the return journey = 45 * (1 - 0.20) = 45 * 0.80 = 36 km/h. Time taken for the return journey = Distance / Speed = 180 / 36 = 5 hours. Answer: b) 5 hours

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