Bonjour,
1h55 = 115mn
60 mn -> 81km
1 mn -> 81/60
115mn -> (81*115)/ 60 =>155,25km
en 10mn
(81*10) / 60 => 13,5km ( vrai)
en 27mn
(81*27)/60 =>36,45 km
4x² +17x -12
