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.
The true circumference of the Earth is about 40,000 km (22,000 nautical miles; 25,000 miles), a figure first established approximately by Eratosthenes in the 2nd century BC, and the distance from the Canary Islands to Japan 19,600 km (10,600 nautical miles; 12,200 miles).