Two wheels revolve around a common axis; bigger one makes 15 and smaller one makes 20 revolutions in a minute, respectively. Starting with a certain point on the circumference downwards. After how many revolutions will they come together in the same position?
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60
Step-by-step explanation:
Revolutions of smaller wheel= 15
Revolutions of bigger wheel= 20
Same position= LCM of 15 and 20 = 60
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