Question

what happens if all the water of the earth doubled?

Answer 1

Answer:

If Earth's diameter were doubled to about 16,000 miles, the planet's mass would increase eight times, and the force of gravity on the planet would be twice as strong. Life would be: Built and proportioned differently.

Answer 2

So it's a dum b question !

Earth in its current state has 1.36 cubic kilometers of water (including all salt and fresh water). If it doubled (adding another 1.36 cubic kilometers) elevations up to 8,744 feet (or 2,665.17 meters) would be submerged in water.