Between the equator and the 46th parallel of latitude, there are 3099 meridional parts. How many degrees of equatorial longitude does 3099 meridional parts represent?

Correct Answer: Option B — 51°39'00"

Meridional parts are calculated using the formula M = 7915.7 log10 tan(45 + L/2). For 3099 meridional parts, the corresponding latitude is approximately 46 degrees. Converting this to equatorial longitude involves understanding the relationship between latitude and the projection of the sphere, resulting in 51 degrees 39 minutes.