How far the aircraft slides before it comes to rest ?

[Colin19]

Homework Statement

An aircraft has to make an emergancey landing on a runway
without landing gear , if the aircraft lands at 40 m\s-1
and μ is 0.5 ,
How far the aircraft slides before it comes to rest ?

Homework Equations

X=2 μ g \ v2

The Attempt at a Solution

2 x 0.5 \ 20 = 2 m ?
Using some website calculator result was : 1600 m
I'm terribly lost

 

[Colin19]

Any help please

 

[azizlwl]

Then compare with a car, do you think they equally stop at same distance.?

 

[Quantum Mind]

Here's a similar thread:

https://www.physicsforums.com/showthread.php?t=274670