Multiple Choice Questions on The diameter of the wheel of a car is 140cm Then in order to keep the speed of 66km hr How many revo........... for Mathematics - All Exams Preparation

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Multiple Choice Questions

The diameter of the wheel of a car is 140cm Then in order to keep the speed of 66km hr How many revo...........

Quantitative Aptitude ( CCS) Mensuration 2D
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    The diameter of the wheel of a car is 140cm. Then, in order to keep the speed of 66km/hr. How many revolutions per minute must the wheel make?

    250
    Correct Answer
    180
    Incorrect Answer
    220
    Incorrect Answer

    195

    Incorrect Answer
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    Explanation:

    Radius of the wheel =70cm = 0.7m
    Circumference=2*22/7*0.7 = 4.4m
    Distance to be covered in 1 min = (66*1000)/60 =1100m.
    Then no of revolutions per minute = 1100/4.4 =250.

    By: Amit Kumar
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