Mars is on average about 225 million km from Earth (the distance varies greatly, depending on both planets' position in their orbits). That translates to an average distance of 12.5 light minutes. It can vary from about 4 minutes to 24 minutes, depending on Mars's current distance from Earth.
Below are some concrete prices to help you determine your new concrete foundation cost. 1  Concrete is typically measured by cubic yards (3âx3âx3â). 2  An average cost for a cubic yard of concrete is $75 to $125, depending on how much is needed and local prices. Labor costs to pour and form concrete run somewhere around $3.50 to $7.00 per square foot. 2  One homeowner paid $11,000 for a crawl space for a 1,500 square foot home. 3  One customer in Texas received a quote for a 2,500 square foot foundation slab of about $20,000.
We pour a lot of 3000 psi. concrete for interior concrete floors and 4000 psi concrete for exterior concrete. The concrete cost per yard of concrete is $92.00 for 3000 3/4 psi concrete and $100.00 for 4000 3/4 psi concrete.