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8th Class Mathematics Direct and Inverse Proportions Question Bank Direct and Inverse Proportions

  • question_answer
    A wheel that has 6 cogs is meshed with a larger wheel of 14 cogs. When the smaller wheel has made 21 revolutions, what is the number of revolutions made by the larger wheel?

    A)  \[4\]                                    

    B)  \[9\]    

    C)  \[12\]                                  

    D)         \[49\]

    Correct Answer: B

    Solution :

    The more the number of cogs the less the number of revolutions.
    Cogs Revolutions
    6 21
    1 \[6\times 21\]
    14 \[\frac{6\times 21}{14}=9\]


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