Hover or tap underlined Spanish terms to see their translation and exam tip.
¿Cuál es la mínima distancia que separa los puntos de la esfera terrestre de coordenadas 25º N, 110º W y 45º N, 156º E? (redondear a la milla)What is the shortest distance between the points on Earth at 25º N, 110º W and 45º N, 156º E? (round to the mile)
Show the answer
Correct answer: c) 4517'
Why it is correct
The shortest way crosses the 180º meridian: ΔLong = 94º. The formula gives 4517 miles.
Why the others are not
- a) It does not match the working.
- b) It does not match the working.
- d) It does not match the working.
How to work it out in the exam
- cos D = sin l1 sin l2 + cos l1 cos l2 cos ΔL, with south latitude negative.
- Turn D into minutes: each minute is a mile.
Where this question comes from
- Junta de Andalucía · 2016 · 1ª convocatoria · CY Módulo de navegación · question 11 Official paper · Official answer key
Pending instructor review. Machine translation, not reviewed.