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Banking Sample Paper RRB Assistant (PT) Sample Test Paper-1

  • question_answer
    A driver of a bus sees a car 50m ahead of him. After 13 seconds the car is 80m behind. If the speed of the bus is 45 kmph, then what is the speed of the car?

    A)  7 kmph

    B)  5 kmph

    C)  12 kmph

    D)  8 kmph

    E)  9 kmph

    Correct Answer: E

    Solution :

    Relative speed \[\text{=}\frac{\text{Total}\,\,\text{distance}}{\text{Total}\,\,\text{time}}\text{=}\frac{\text{50+80}}{\text{13}}\text{=10}\,\,\text{m/s}\] \[\therefore \]\[\text{10}\,\,\text{m/s=10 }\!\!\times\!\!\text{ }\frac{\text{18}}{\text{5}}\text{kmph=36}\,\,\text{kmph}\] Now related speed = Speed of bus - speed of car or, 36 = 45 - speed of car


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