Assume that nickels are measured in diameter, and we want to form the certain number of nickels to form an inch.
Let the diameter of the nickel be 22 millimeters, which is 2.2 centimeters. Note that 1 inch = 2.54 centimeters. Then, there is no definite number of nickels that exactly form an inch since:
2.54 centimeters * 1 nickel / 2.2 centimeters = 1.15... nickels [and we obtain the "incomplete" nickel to form an inch]!
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US nickels are 1.95 mm thick. A US inch is 25.4 mm so you would need 25.4 / 1.95 = 13 coins.
One bank box contains $100 worth of nickels, which is 2,000 coins.
20 nickels in a dollar so if you have a million dollars you have 20 million nickels.
There are 20 nickels in one dollar. Therefore, one million dollars is equal to 1000000 x 20 = 20000000 nickels.
20