How to determine how many degrees the ocean stretches along the equator?

80 to 180 ° W the distance is 100 ° and from 130 to 180 ° E. – 50 °. Let’s find the sum of degrees: 100 ° + 50 ° = 150 °. At 1 ° on the equator 111 km; 111 km x 150 ° = 16 650 km.

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