Question

Q3. Two bells ring once at the same time. After that, the first bell rings after every 63 minutes, and the
second after every 12 minutes. After how many minutes will they again ting together?

Answer 1

Step-by-step explanation:

The lcm of 16 and 30 is 240

16= 2 x2x2x2

30= 2x3 x5.

So LCM is 2 x2x2x2 x3x5 =240.

So after 240- minutes the TWO BELLS will ring at the same time.

During this period Bell -A would have rung 15- times and Bell-B would have rung 8- times.