Based on the clue 'at about 23 of a square mile upper lake is the sma...', what is the answer?

What is associated with: at about 1700 square miles this saline lake is one of the largest lakes in the world with no o… What is associated with: at about 17000 mph the worlds fastest winged vehicle is this one when in orbit? Based on the clue 'at about 175 miles its europes westernmost landloc...', what is the answer? What is associated with: at about 2200 miles in length its the longest african river emptying into the indian ocean? Based on the clue 'at about 230 miles its not only the longest river ...', what is the answer? What is associated with: at about 25000 feet down the cayman trench is the deepest part of this sea? What is associated with: at about 29000 ft the summit of this nepalese peak reaches 23 of the way throught the earths t… What is associated with: at about 3700?