Question: what is the diameter of earth in km
Answer: 78 km / s ( 107,200 km / h ; 66,600 mph ) , which is fast enough to travel a distance equal to Earth 's diameter , about 12,742 km ( 7,918 mi ) , in seven minutes , and the distance to the Moon , 384,000 km ( 239,000 mi ) , in about 3.