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07-03-2017
Mathematics

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You have two disks. The bigger one has 24 inch radius and its is rigidly attached to a peg (it doesn’t turn or move). The smaller one has 8 inch radius and it rotates around the bigger disc. How many times does the smaller disc about its centre when it has completed one full revolution around the bigger disc?

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Аноним Аноним

07-03-2017

perimeter of bigger disc = 2π*24 inch
perimeter of bigger disc = 2π*8 inch

number of rotations =2π*24/2π*8 = 3

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