Salut !
1) 1 mn = 60 s
donc : 60 s × 8 Mo/s = 480 Mo
2) 250 ÷ 480 = 0,5208333..... mn
= (0,52083333.... × 60) s
= 31,25 s
3) 2 mn = 120 s
donc : 250 Mo ÷ 120 s = 2,083333.... Mo/s
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Salut !
1) 1 mn = 60 s
donc : 60 s × 8 Mo/s = 480 Mo
2) 250 ÷ 480 = 0,5208333..... mn
= (0,52083333.... × 60) s
= 31,25 s
3) 2 mn = 120 s
donc : 250 Mo ÷ 120 s = 2,083333.... Mo/s