Half-circles 81731

A skier skis down a black slope. He makes a total of 31 half-circles while going down the hill. The radius of one semicircle is 4m. What distance did he travel?

Correct answer:

x =  390 m

Step-by-step explanation:

n=31 r=4 m  o=π r=3.1416 412.5664 m  x=n o=31 12.5664=390 m

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