The radius of the earth is estimated to be somewhere between 6,353 km and 6,384 km.
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City-center to city-center, Johannesburg, South Africa to Sydney, Australia = 11,045 km (rounded)
The surface of the earth has an area of approx 510.1 million sq km → 510.1 million km² ÷ 4.9 million km² ≈ 104.1 times.
it is literely impossible to know!!
An astronomical unit is the average distance from the Sun to the Earth; about 150,000,000 km.
Surface area: 510,072,000 km² 148,940,000 km² land (29.2 %) 361,132,000 km² water (70.8 %) or Approx. 120 trillion