Earth's circumference

Calculate the Earth's circumference of the parallel 48 degrees and 10 minutes.

Correct answer:

x =  26728.1018 km

Step-by-step explanation:

R=6378 km α=486010=48+6010=6048 60+10=602890=628948.1667   cosα=r/R  r=R cosα=R cos48.166666666667° =6378 cos48.166666666667° =6378 0.666966=4253.90952 km  x=2π r=2 3.1416 4253.9095=26728.1018 km=2.673104 km

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