Exercice 1 svp J arrive pas expliquez svp

bonjour

Vélo + course à pieds = 3/4 + 1/5 = 15/20 + 4/20 = 19/20

Nage = 20/20 - 19/20 = 1/20 

1/20 = 100 m
20/20 = 2 000 m

vélo = 2000 x 3/4 =  1500 m 
course = 2000/5 = 400 m
nage = 100 m