Question

Six bells commence tolling together and toll at intervals of 2, 4, 6, 8, 10 and 12 seconds

respectively. In 30 minutes, how many times do they toll together?

(1) 4 (2) 10 (3) 15 (4) 16​

Answer 1

Answer:

LCM of these balls is 120 sec.

then

in 30 mim. it will toll together

=30/2

=15

times

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Answer 2

Answer:

15 because here each bell takes teo seconds respectivly

Step-by-step explanation:

converting into seconds 15*60=900

Afterall each bell takes 2 sec

then0900/2=450