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Sagot :

Réponse :

Explications étape par étape

bjr,

2h22+ 2h53 + 3h34 = 7h 109mn  =>

420mn + 109mn = 529mn =

31740s

31740/ 3 =10 580s

10580/60 = 176mn et 20s

176/60= 2 h et 56 mn

=> 2h 56mn 20s

4 à 6ans=2h22= 142min
7 a 10ans=2h53 = 173min
11 a 14ans=3h34 = 214min

142+173+214=529

529:3=176 min

176min= 2h56

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