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find the distance along an arc on the surface of the earth that subtends a central angle of 10 minutes (1 minute = 1/60 degree). The radius of the earth is 3960 miles.

Sagot :

Answer

The length of the arc = 11.52 miles

Explanation

The length of an arc is given as

[tex]\text{Length of an arc = }\frac{\theta}{360\degree}\times2\pi r[/tex]

For this question,

θ = Angle subtended at the middle of the circle we are concerned about = 10 minute = (10/60) degrees = 0.167 degrees

π = pi = 3.142

r = radius of the earth = 3960 miles

[tex]\begin{gathered} \text{Length of an arc = }\frac{\theta}{360\degree}\times2\pi r \\ \text{Length of an arc = }\frac{0.167\degree}{360\degree}\times2\pi\times3960 \\ =11.52\text{ miles} \end{gathered}[/tex]

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