Question

three Bells toll at intervals of 12 minute, 15 minute and 18 minutes respectively. if they start tolling together at 9 a.m., at what time will toll together next​

Answer 1

Answer:

180 minutes.

Step-by-step explanation:

The bells toll at intervals of 12 min, 15 min and 18 min, respectively. (given)

After they start together, they would meet at the time when their tolling interval coincides i.e. The L.C.M of 12 15 and 18.

12 = 2*2*3

18 = 3*3*2

15 = 3*5

L.C.M is the product of distinct factors raised to the highest powers,

Thus, the L.C.M is:

2*2*3*3*5 = 180 minutes.

Hence, they will toll together after 180 minutes of starting i.e. after 3 hours.

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i hope it will helps you friend

Answer 2

prime factorise all numbers

Step-by-step explanation:

12=2^2×3

15=3×5

18=3^2×2

lcm=3^2×5×2

=180

180 min= 3hr

so. next they will toll together after 3 hour.

pls mark brainiest