10.2 miles
At over 10 miles long, Bedford Avenue is the longest street in Brooklyn.
They are about 3.5 miles apart as the crow flies, according to the measurements I got from Google Maps: I measured a straight line from where the Hudson River touches New Jersey, across the Hudson River, across Manhattan at approximately 59th Street, across the East River, to where the East River touches Brooklyn.
2.5 miles
Its about 7 miles by way of King's Highway. I would catch a cab. MapQuest directions will permit you to enter the addresses and give you a map and turn-by-turn directions.
The Hudson river is about 315 miles long
It is 104 miles from Venice to Hudson
390 miles from Los Angeles to San Quentin prison.
about 620 miles
There are 508.38 miles of street in Manhattan. If you include all 5 boroughs, there are 5936.18 miles of paved streets (Manhattan, Brooklyn, Queens, Bronx, Staten Island)http://www.fcny.org/cmgp/streets/pages/reports.htm
3.9 miles.
The Brooklyn bridge is 1.13 miles long. If you want to walk it to Brooklyn and then back, its 2.26 miles long.
It is about 4.5 miles (7.24 kilometers). Brooklyn and Queens both occupy the western end of Long Island, and Queens is on top of Brooklyn. LaGuardia Airport is at the northern edge of Queens. The northern edge of Brooklyn is roughly 4.5 miles/7.24 kilometers south of LaGuardia.