How long is black mamba?

The Black Mamba is the longest Venomous Snake in Africa. It averages around 2.5 to 3.2 meters (8 to 10 feet) in length. Large Mamba's can grow upto 4.4 meters (14.6 feet) in length. It is called the Black Mamba because of the black color of its mouth. It is also the fastest snake in the world reaching speeds of around 16 to 20 kmph.