The Japanese 5 yen coin has a hole in the middle. If the diameter of the coin is 22 mm and the diameter of the hole is 5 mm, how would you calculate in terms of Pi how much longer the outer edge is than the inner edge?

Solution:

Given that Japanese 5 yen coin has a hole in the middle. If the diameter of the coin is 22 mm and the diameter of the hole is 5 mm,

So, Our Equation will be 22/5 - 5/2 mm

Let's Solve this Equation ;

☛ 22/5 - 5/2

☛8.5 mm

Therefore, Required Answer is 8. 5 mm .

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