I might not have seen that post.
Then you didn't look. I'm getting tired of you not looking, not reading, and giving flippant answers to questions. So is everyone else here.
Yes a heavily modified Earth where a year is ten times longer but if you met someone from this world you could not tell them apart from a normal human.
Also it has five times the surface area, coal, oil and gas will at modern usage levels will take a at least a 1000 years to even run low same for any other raw material.
So it's not Earth at all.
To get 5 times the surface area, your radius has to be √(5) (or about 2.2361) times that of the Earth (area of a Sphere is A=4πr²).
Let us call this new radius r'.
That doesn't sound like much until you remember that the formula for the volume of a sphere is V=(⁴/₃)*π*r³.
Because the volume is a third power function of radius, not a second, the volume is going to grow faster than the surface area it follows that our new volume is V=(⁴/₃ )*π*r'³, which is about 11.2 times the volume of the original.
This wouldn't be a problem, but the force of gravity is linearly related to the gravitational constant G and the product of the masses of the two objects and inversely proportional to the square of the distance between the centers of the objects.
If we work from the surface of the larger object, and assume that the objects are of sufficiently different size (say a planet is the larger object, and anything not mega-meter scale is the smaller one), the distance between the centers can be approximated by the radius of the larger object (which we had defined earlier as r). The formula is F=G(mₑ*mₓ)/(r²) where mₑ is the mass of the planet, mₓ is the mass of the smaller object, G is the gravitational constant (Thanks Sir Issac!).
The Mass of the planet is linearly dependent on it's volume and it's density. m=vρ if the density (ρ) is the same, then the increase in mass is proportional to the increase in volume (or, 5^(3/2))Going forward, if we call the mass of the new planet mᵦ we find that mᵦ is 5^(3/2) times mₑ. Plugging this into the Gravity equation (along with substitution of r' for r) we find that the force of gravity on your world is going to be 5^½ times that of Earth (~2.24 times that of Earth - the acceleration due to gravity is now greater than 20 meters per second per second). Everything changes.
EVERYTHING.