| 1 | A | B | C | D | E | F |
| --- | --- | --- | --- | --- | --- | --- |
| 2 | Geographic coordinate system - Length of a degree |  |  |  |  |  |
| 3 | Latitude | City | Degree | Minute | Second | ±0.0001° |
| 4 | 60° | Saint Petersburg | 55.80 km | 0.930 km | 15.50 m | 5.58 m |
| 5 | 51° 28′ 38″ N | Greenwich | 69.47 km | 1.158 km | 19.30 m | 6.95 m |
| 6 | 45° | Bordeaux | 78.85 km | 1.31 km | 21.90 m | 7.89 m |
| 7 | 30° | New Orleans | 96.49 km | 1.61 km | 26.80 m | 9.65 m |
| 8 | 0° | Quito | 111.3 km | 1.855 km | 30.92 m | 11.13 m |

Question: At 0° latitude, what is the length of a degree, minute, and second?
Answer: In geographic coordinate system, on the Equator, one second measures 30.92 metres, a minute is 1855 metres and a degree is 111.3 kilometres.