Structural Engineer Costs. Homeowners spend an average of $512 on hiring a structural engineer, with most homeowners spending between $319 and $708. The larger and more detailed the project is, the higher the cost of hiring a structural engineer becomes. Some professionals charge by the job, while others may charge by the hour.
The total surface area of Earth is about 197 million square miles (509 million square km). About 71 percent is covered by water and 29 percent by land.
How many miles around the poles?   The circumference of the earth at the equator is 40,075.16 kilometers or 24,901.55 miles. The shorter circumference of the earth over the poles is 40,007.86 kilometers â¦or 24,859.73 miles. The difference is 67.3 kilometers or 41.82 miles. This shape is known as an ellipsoid or more properly, a geoid (earth-like). 2 people found this useful.