1mm
About 6,800 kilometers (4,200) miles long.
2900 km
Britain is 243,610 km²Amazon is 5.5 million km²Therefore, the Amazon is much bigger than Britain.
85 km wide and 50 m deep
About 1,740 miles.
Amazon, Nile, Mississippi-Missouri, YangseNile, Africa (6,825 km)Amazon, South America (6,437 km)Chang Jiang (Yangtze), Asia (6,380 km)Mississippi, North America (5,971 km)
Wel my research says that vocanoes can be about 400 km deep or even more.ABOUT 400 km only science people know.
Mississippi - 2,320 miles Nile - 4,135 miles Amazon - 3,980 miles
40 metres deep.
The Amazon Rainforest is roughly 5,500,000 km² or 2,123,562 sq mi.
34.37 km
Valles Marineris is about 4000 km long, 200 km wide, and 7 km deep.