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NTSE Sample Paper NTSE SAT Practice Test-19

  • question_answer
    A wheel of a bicycle has inner diameter 50 cm and thickness 10 cm. What is the speed of the bicycle if it makes 10 revolutions in 5 seconds?

    A) 5.5/sec                         

    B)   4.4/sec

    C) 3.3/sec                         

    D) 2.2/sec

    Correct Answer: B

    Solution :

    [b] Radius of the wheel \[=\left[ \frac{1}{2}(50)+10 \right]\] cm =35 cm                Distance travelled in one round             \[=2\times \frac{22}{7}\times 35\,\,cm\] \[\therefore \] Distance travelled in five seconds =10 rounds \[10\times 2\times \frac{22}{7}\times 35cm=22m\] Speed of the bicycle \[=\frac{22}{7}\] m/sec = 4.4 m / sec.


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