New Enroll in RBI Grade B New Batch - Starts on May 21

    Question

    John travelled a total distance of 432 km. He covered

    5/8 of this distance at a constant speed of 30 km/h. To complete the entire journey in 13.5 hours, what speed must he travel the remaining distance at?
    A 40 km/h Correct Answer Incorrect Answer
    B 36 km/h Correct Answer Incorrect Answer
    C 48 km/h Correct Answer Incorrect Answer
    D 32 km/h Correct Answer Incorrect Answer

    Solution

    (5/8) of 432 km = 270 km So, time taken to travel 270 km = 270 ÷ 30 = 9 hours Remaining distance = 432 - 270 = 162 km Remaining time = 13.5 - 9 = 4.5 hours So, speed at which remaining distance is to be travelled = 162 ÷ 4.5 = 36 km/h

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