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Three bells ring at intervals of …

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Three bells ring at intervals of 9,12,15 minutes respectively.if they start ringing together at a time,after what time will they next ring together

    • Posted by Manosh Kumar 9B 3 years, 2 months ago

    CBSE > Class 10 > Mathematics
    • 1 answers

    Harkanwal Simgh 3 years, 2 months ago

    You have to take LCM of respective numbers as... 9= 3² 12= 2²×3¹ 15 = 3¹×5¹ Now multiplying numbers of greater powers, we get 3²×2²×5¹ = 180minutes Or After 3 hours

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