Question

4. Toy train A crosses a pole after every 24 seconds. Toy train B crosses the pole after every 30 seconds and toy train C crosses the pole after every 36 seconds. After how many minutes, do they all cross the pole together?​

Answer 1

Answer:

24 + 30 + 36 = 90 this is the answer

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Answer 2

Answer:

lcm is 360 so in all 6 minutes

Step-by-step explanation:

The least common multiple of 24, 30, 36 is the required time after that all the rains cross the pole together.

LCM of 24, 30, 36

          2        |   24, 30, 36

                    |__________

          3        |    12, 15, 18

                    |__________

        2          |    4, 5, 6

                    |__________

                         2, 5, 3

                   Therefore, after 6 minutes three trains cross the pole together.

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