1.

Three wheels can complete 60, 36, 24 revolutions per minute respectively. There is a spot on each wheel that touches the ground at time zero. After how much time, all these spots will simultaneously touch the ground again.

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Three wheels can complete 60, 36, 24 revolutions per minute respectively. There is a spot on each wheel that touches the ground at time zero. After how much time, all these spots will simultaneously touch the ground again.




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