How many decimeters are in a second?

Answer 1

1 second of arc is equal to 0.000 277 777 777 78 of a degree. 1 degree equals 69 miles. Multiply 0.000 277 by 69 and you get 0.019113 of a mile, then change that to decimeters and you get 307.5.

I think you are close. One degree of latitude is equal to 60 nautical miles. One minute is equal to 1 nautical mile. One Second is equal to 1/60 of a nautical mile.

If there are 1852 meters in a nautical mile and 10 decimeters per meter, that would be 18,520 decimeters per nautical mile. Divide 18,520 by 60 and you get 308.666 decimeters.