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SSC Sample Paper Mock Test-19 SSC CGL Tear-II Paper-1

  • question_answer
    The diameter of the driving wheel of a car is 140 cm. Then, in order to keep a speed of 66 km/h how many revolutions per minute must the wheel make?

    A) 250      

    B)  275

    C)  290

    D)  295

    Correct Answer: A

    Solution :

    Radius of the wheel \[=70\,\,\text{cm}=0.7\,\,\text{m}\] Circumference of the wheel \[=\left( 2\times \frac{22}{7}\times 0.7 \right)\,\,\text{m}=4.4\,\,\text{m}\] Distance to be covered in 1 min \[=\frac{66\times 1000}{60}=1100\,\,\text{m}\] \[\therefore \] Number of revolutions per minute \[=\frac{1100}{4.4}=250\]


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