Question

Two bells toll at an interval of 42 and 5 sec. After how many sec they both will ring together

Answer 1

Answer:

both will ring together after 210 sec i.e., 3 min 30 sec

Step-by-step explanation:

interval change = ( LCM of 42 & 5 ) sec = 210 sec or 3 min 30 sec.

hence, both bells will ring together after 210 sec or 3 min 30 sec

Answer 2

They both will ring together after 210 seconds

Step-by-step explanation:

First bell toll at an interval of 42 seconds

Second bell toll at an interval of 5 seconds

We are supposed to find After how many sec they both will ring together

So, We are supposed to find the LCM of 42 and 5

2 |  42 ,5

3 | 21 , 5

7 | 7 ,5

5 | 1 , 5

  |  1 , 1

LCM =$2 \times 3 \times 7 \times 5 = 210$

Hence they both will ring together after 210 seconds

#Learn more:

Two bells toll at an interval of 42 and 24 sec. After they start at the same time ,again how many sec. Will they ring together?

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