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7th Class Mathematics Integers Question Bank Integer

  • question_answer
    An elevator descends into a mine shaft at the rate of 8 m/min. If the descend starts from 12 m above the ground level; how7 long will it take to reach\[-468\text{ }m\]?

    A)  60 mins          

    B)  30 mins          

    C)         50 mins      

    D)         10 mins                      

    Correct Answer: A

    Solution :

    Total distance covered from A to C \[=12+468=480\,m\] \[Speed=8\text{ }m/min\] \[\therefore \]  Time \[=\frac{Total\text{ }distance\text{ }covered}{Speed}\] \[=\frac{480}{8}=60\,\text{minutes}\]


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