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clear
clc
disp('Exa-2.5');
Lo=100*(10^3); //Lo is converted to Km
u=0.999978; ////u/c is taken as u since u is represented in terms of c.
L=Lo*(sqrt(1-u^2)); // from the length contraction formula
printf('Hence the apparent thickness of the Earth''s surface is %.2f metres.',L);
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