Puzzle | One Mile on the Globe Last Updated : 18 Jan, 2023 Comments Improve Suggest changes Like Article Like Report Q. Find out the number of points on the globe (Earth) where if we move one mile south, then one mile east and finally one mile north, we arrive at the starting point. Options: A) One B) Two C) Infinite D) Zero Solution: C Explanation : Moving one mile east or west corresponds to rotating the globe by the Radian equivalent of one mile. The Northernmost point is the North Pole (cannot go North from there) and the Southernmost point is the South Pole (cannot go South from there). Further, rotating the globe by any amount will not alter the position if we are present on either of the Poles. Clearly, one such point is the North Pole. Note that South Pole can't be in the solution set because if we go South from the South Pole, we end up at the South Pole itself. Similarly if we go North of the North Pole, we end up at the North Pole itself. Now consider the latitude located at (1/R) radians from the Earth's axis (where R is the vertical radius of the Earth), in the Southern Hemisphere. When we go one mile South, we end up at the South Pole. When we go one mile east, we are basically rotating the globe westwards by the radian equivalent of one mile (rotating it about the axis, means we are still present on the South Pole) and finally when we go back 1 mile North, we reach the same point we began with. This is true for all the infinite points on this latitude. Comment More infoAdvertise with us Next Article Puzzle | One Mile on the Globe M mananraheja_NSIT Follow Improve Article Tags : Aptitude Similar Reads Puzzle - The Hands of a Clock First Overlap Question: An hour hand and a minute hand are standard on a clock. At 12 midnight the hands are exactly aligned. When will they next precisely align or overlap? How frequently will they cross paths each day? Solution: a) The hour hand revolves more slowly than the minute hand. In one minute, the minu 2 min read Puzzle | Minimum planes to go around the world On an Island, there is an airport that has an unlimited number of identical air-planes. Each air-plane has a fuel capacity to allow it to fly exactly 1/2 way around the world, along a great circle. The planes have the ability to refuel in flight without loss of speed or spillage of fuel. Though the 2 min read Puzzle 70 | Tom and Jerry Once upon a time Tom and Jerry thought of having a race on a circular track. The diameter of the track was 200 yards. They both started from same starting point. Tom being confident did not move until he found jerry has moved 1/8-th of the distance.Now Tom starts to move and meets jerry on the circu 1 min read Puzzle 68 | Walking down the hill I can walk 3 miles per hour uphill and 4 miles per hour on flat land and 6 miles per hour downhill. If I reached the beach nearby me, walking for 50 minutes and I walked back home in 1 hour, can you calculate the total distance from my house to the beach? (Note: I walk with the same uniform speed.) 2 min read Puzzle - Two Creepers Climbing a Tree Question: Jasmine and rose creepers are two creepers (climbing plants) that are both climbing up and around a cylindrical tree trunk. Both jasmine and rose begin at the same spot on the ground and twist both clockwise and counterclockwise. The rose had done three complete twists and the jasmine had 3 min read Like