Question

A bell rings every 18 seconds, another every 60 seconds. At 5:00 p.m., the two ring
simultaneously. At what time will the bell ring again at the same time?​

Answer 1

Answer:

5:03

Step-by-step explanation:

by finding the LCM of the timings, we can know the exact time they ring together again.

LCM of 18 and 60 is 180

therefore the bell will ring again after 180 seconds i.e. 5:03

Answer 2

Given:

A bell rings every 18 seconds, another every 60 seconds. At 5:00 p.m., the two ring simultaneously.

To Find:

At what time will the bell ring again at the same time?​

Solution:

We know that,

Both the bells ring simultaneously at 5:00 p.m

One bell rings every 18 seconds while the other rings every 60 seconds.

By finding the LCM of the timings, we can know the exact time they ring together again.

LCM of 18 and 60 is 180

So, the bells will ring simultaneously after 180 seconds.

180 seconds = 3 minutes

Hence, both bells will ring simultaneously at 5:03 pm