Question

three bells toll at interval of 9, 12, 15 minuts if they starts tolling together after what time ​

Answer 1

Answer:

180min

Step-by-step explanation:

lcm 9, 12, 15

      9=3×3

      12=3×4

      15=3×5

lcm=3×3×4×5

     =9×20

     =180

after 180min

Answer 2

Answer:

3 hours later

Step-by-step explanation:

We need to find LCM

LCM of 9, 12 and 15 is 180

180 mins = 3 hours

So, they will start tolling/ringing after 3 hours

Hope it helps

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