Mice

Mice consumed a circular hole in a slice of cheese. The cheese has the shape of a circular cut with a radius of 20 cm and an angle of 90 degrees. What percentage of the cheese ate mice if they made 20 holes with a diameter of 2 cm?

Correct answer:

f =  20/1 = 20 %

Step-by-step explanation:

r=20 cm D2=2 cm r2=D2/2=2/2=1 cm n=20  S=4π r2=43.1416 202314.1593 cm2 S2=n π r22=20 3.1416 1262.8319 cm2  f=100 SS2=100 314.159362.8319=20%



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