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SSC Sample Paper SSC CGL - Sample Paper-22

  • question_answer
    5 bells start tolling together and toll at intervals of 2, 4, 6, 8 and 10 s respectively. How many times do the five bells to B together in 20 min?

    A) 10        

    B) 11

    C) 12                                

    D) 15

    Correct Answer: A

    Solution :

    LCM of 2, 4, 6, 8 and 10 is 120. i.e., 2 min after tolling together. In 20 mm tolling \[\text{=}\frac{\text{20}\,\text{min}}{\text{2}\,\text{min}}\text{=10}\,\text{times}\]        


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