Quickly
Answer :
If t : time for Mario to
run 10 m and Luigi for 7 m.
Calculate time of Mario
" x " to complete his 13 m : (10 / t)
= (13 / x)
<==> x = 1,3t
Calculate time for
Luigi " y " to complete 10 m :
(7 / t) = (10 / y) <==> y = 1,43t
Mario wins by about
(1,43t - 1,3t) = 0,13t
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