# Rotation of the Earth

Calculate the circumferential speed of the Earth's surface at a latitude of 61°​​. Consider a globe with a radius of 6378 km.

Correct result:

peripheral speed:  224.9 m/s

#### Solution:

$v = \dfrac{ 2\cdot6378\pi }{ 24\cdot3.6} \cos 61 ^\circ = 224.9 \ \text{m/s}$

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