Multiple Choice Questions on A boy goes to his school from his house at a speed of 3 km hr and returns at a speed of 2 km h........... for Mathematics - All Exams Preparation

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Multiple Choice Questions

A boy goes to his school from his house at a speed of 3 km hr and returns at a speed of 2 km h...........

Quantitative Aptitude ( CCS) Time & distance
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     A boy goes to his school from his house at a speed of 3 km/hr and returns at a speed of 2 km/hr. If he takes 5 hours in going and coming, the distance between his house and school is ?

    5 km

    Incorrect Answer

    5.5 km

    Incorrect Answer

    6 km

    Correct Answer

    6.5 km

    Incorrect Answer
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    Explanation:

    Since the distance travelled by him is same in both the cases, So

    The Speed ratio is inverse to the Time ratio.

    Speed Ratio  =>  3 : 2

    Time Ratio     => 2 : 3

    Total time taken = 5 hrs. 

    So 5 units -------> 5 hrs 

    Time taken in the 1st and 2nd case is 2 hrs and 3 hrs respectively.

    Distance can be found with any of the case.

    D = S * T

    D = 3 * 2 = 6 km

    By: Deepak Dawra
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