#### Answer

The Nile River is longer by 208 km.

#### Work Step by Step

We know that 1 mile = 1.6 kilometers.
We can convert the length of the Nile River from units of miles to units of kilometers.
$4130~mi = \frac{4130~mi}{1}\times \frac{1.6~km}{1~mi} = 6608~km$
The Nile River has a length of 6608 km.
The Amazon River has a length of 6400 km.
The Nile River is longer by 208 km.