Solution: If the radius of the earth is 3959 miles, find the speed in miles per hour.

(Last Updated On: December 20, 2017)

If the radius of the earth is 3959 miles, find the speed in miles per hour.

Problem Statement: EE Board April 1997

A ship on a certain day is at latitude 20ºN and longitude 140ºE. After sailing for 150 hours at a uniform speed along a great circle route, it reaches a point at latitude 10ºS and longitude 170ºW. If the radius of the earth is 3959 miles, find the speed in miles per hour.

  • A. 17.4
  • B. 15.4
  • C. 16.4
  • D. 19.4

Problem Answer:

The speed of the ship is 16.56 NM/hr or 16.56 knots.

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Solution: If the radius of the earth is 3959 miles, find the speed in miles per hour.
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