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Sagot :

Réponse :

Explications étape par étape

Bsr,

55/ 11 =5

Kayak : 5km

course à pied: 3*5 = 15 km

vélo: 5*7 = 35km

Kayak : 1km en 10mn => 5km en 50mn

course à pied: 12km/h

12km ->60mn

1km -> (60/12)

15km -> (60*15)/12 = 75mn => 1h 15mn

Vélo:

21km/60mn

1km -> 60/21

35km -> (60*35)/21 => 100mn => 1h40

Temps total

50mn + 75mn + 100mn = 225mn

225mn = 60+60+60 +45= 3h 45mn

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