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8th Class Mathematics Related to Competitive Exam Question Bank Calendar and Clock

  • question_answer
    One pendulum ticks 57 times in 5 8 sec, while another ticks 608 times in 609 sec. If they started together, then how often will they tick together in the first hour?

    A) 47                               

    B) 53

    C) 57                               

    D) 67

    Correct Answer: C

    Solution :

    LCM of 58/57 and 609/608 sec. In 1 hour, they will tick together \[=3600\times 19/1218=56.1\]times after the first stroke \[\Rightarrow \]57 times per hour.


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