Why is the water in the mississippi river more than volume of water in the nile river?

Question

why is the mississippi river ten times more than the nile river

Answer 1

The Mississippi River has a larger drainage basin than the Nile River.  

Answer 2

The Mississippi watershed is bigger with more water dumping into it. More rivers drain into it and those rivers are bigger.

The Nile is an exotic river meaning it's a constant river surrounded by dry desert. The Mississippi and its tributaries run through a much wetter climate.

Answer 3

because the mississippi river is deaper and wider than the nile