30 Million Hours!!
8 hours.
It has been estimated that the three phases of the construction required more than thirty million hours of labour.
24 hours
708.74 hours (29.531 Earth-days)
It takes exactly 24 hours
It was built about 5000 yrars ago so nobody knows.
77.
An Earth complete spin is 24 hours.
9 days
192
9.925 hours
According the AA Route Planner (GB Edition) the distance is 39.9 miles, this will take about 0 hours and 56 minutes to drive, assuming you take the direct route to the centre of each location and there are no stops, accidents, breakdowns or other hold ups en route.