Question

Five bells toll at the interval 2, 3, 4, 5, 6, and 6 second . how many times they will toll together in 30 minutes?​

Answer 1

Step-by-step explanation:

Answer: lcm of 2,3,4,5,6=60.

Answer 2

Answer:

.

Solution

verified

Correct option is B)

The times after whic the bells ring together must be equal to the LCM of 2,4,6,8,10 and the LCM of these numbers is:

2×2×2×3×5=120 seconds

We know that there are 60 seconds in one minute, therefore, 120 seconds will be same as 2 minutes.

Now, we find the number of times that the bells toll together in 20 minutes as follows:

2

20

+1=10+1=11

(Note: 1 is added because the bells are tolling together)

Hence, the bells toll together 11 times in 20 minutes