Question

The 3 different bells at different testing machines in a laboratory ring after 48 min, 60 min and 84min.if they ring at 1 a. M today, at what time will they ring again

Answer 1

Answer:

LCM:

4 )48, 60,84,

3 )I2, 15, 21

4, 5, 7

LCM=4x3x4x5x7:240x7=1680

l680 min = 1680/60 = 28hrs

I .am +28 hrs=

ring again at 5am next day

.

I

Answer 2

They will ring after 1 day at 5 a.m.

Step-by-step explanation:

Since we have given that

3 different bells ring after

48 min, 60 min, 84 min

So, LCM of 48, 60 and 84 = 1680 minutes

As we know that

1 hour = 60 minutes

So, 1680 minutes = $\dfrac{1680}{60}=28 hours$

So, they will ring after 1 day at 5 a.m.

# learn more:

There are 3 bells ringing at 8 min, 10 min and 20 min interval respectively . if they ring together at10 a.m at, what time they will ring together again​

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