if u r asking about going around the sun then it takes 365 and one fourth days depend on how fast you are going. The earth's circumference is about 40,000 km.
So: time = distance/velocity.
Remember to make sure your velocity is in km per *something time*.
it depends on what vehical your using a plane,truck,baot
i farted
Here is a site that records all the known round the world flights: http://earthrounders.com
about 80 days
not sure
A year - 365.2422 days.
about 29 years
One year.
the earth rounders link is for a web site of all the known round the world flights
3 months
It takes 28 days for the moon to travel round the earth.
52 years