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.
As a consequence, a line of longitude wrapped around the Earth going through the north and south poles is about 24,860 miles, or 40,008 km long. The circumference of the Earth at the equator is about 24,901 miles, or 40,075 km. That makes the Earth's circumference about 41 miles, or a bit more than 67 km larger around its middle than around its poles.