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6th Class Mathematics Related to Competitive Exam Question Bank Distance, Time and Speed

  • question_answer
    A worker reaches his work place 15 minutes late when he walks at a speed of 4 km/h from his house. The next day he increases his speed by 2 km/h and reaches his work place on time. Find the distance from his house to his workplace.

    A) 4km                

    B)          2km

    C) 3km                

    D)          6km

    Correct Answer: C

    Solution :

        Let the distance be x km. Then the time taken on the 1st day \[=x/4\] Time taken on the 2nd day \[=x/6\] We are given \[\frac{x}{4}-\frac{x}{6}\,=\frac{15}{60}\,\Rightarrow \,x=\frac{15}{60}(12)=3\,km\]


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