Multiple Choice Questions on A bus leaves the stop 30 minutes before the scheduled time The driver decreases its speed by 30km hr........... for Mathematics - All Exams Preparation

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Multiple Choice Questions

A bus leaves the stop 30 minutes before the scheduled time The driver decreases its speed by 30km hr...........

Quantitative Aptitude ( CCS) Time & distance
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    A bus leaves the stop 30 minutes before the scheduled time. The driver decreases its speed by 30km/hr. At the next bus stop 180 km away, the bus reached on time. Find the original speed of the bus?

     

    110km/hr
     

    Incorrect Answer

    120km/hr
     

    Correct Answer

    130km/hr
     

    Incorrect Answer

    140km/hr

    Incorrect Answer
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    Explanation:

    Distance = 180km, actual speed = x and actual time  = t
    180 = x*t
    180 = (x – 30)*(t +1/2)
    Solve both equation, we will get x = 120km/hr

    By: Sandeep Dubey
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