Question

Three bells ring at intervals of 48,60 and 72 mins, If they start ringing together after how much time will the next sing togother?

ANSWERPLSS​

Answer 1

Answer:

let's we take LCM of these tree numbers 48,60and72---

we found 720.

it means if bells are start ring together at the same time, those are next sing together after 720 minutes..

' .

Answer 2

Three bells will next sing together in 720 mins

Given :

Three bells ring at intervals of 48,60 and 72 mins

To find :

If they start ringing together after how much time will the next sing together

Solution :

Step 1 of 2 :

Find the LCM of 48,60 and 72

Here it is given that three bells ring at intervals of 48,60 and 72 mins

We prime factorise the given numbers

48 = 2 × 2 × 2 × 2 × 3

60 = 2 × 2 × 3 × 5

72 = 2 × 2 × 2 × 3 × 3

LCM

= 2 × 2 × 2 × 2 × 3 × 3 × 5

= 720

Step 2 of 2 :

Find when three bells will next sing together

Since the LCM = 720

Hence three bells will next sing together in 720 mins

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