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A u.s. dime has a thickness of 1 7/20 millimeters. Gary has a stack of dimes 78 3/10 millimeters tall. how many dimes does he have?
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A u.s. dime has a thickness of 1 7/20 millimeters. Gary has a stack of dimes 78 3/10 millimeters tall. how many dimes does he have?

User Tobbe
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A thickness of a dime is :
1 7/20 mm = 27/20 mm
78 3/10 mm : 27/20 mm =
= 783/10 : 27/20 =
= 783/10 * 20/27 = ( 783 * 20 ) / ( 10 * 27 ) =
= 15,660 / 270 = 58
Answer: He has 58 dimes.
User Giorgi Gviani
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