Bonjour,
a) 1 L = 1 dm³
1 km³ = 10¹² L
10¹² L = 1 teralitre
Donc 1 km³ = 1 TL
b) 1 tonne = 10⁶ g
1 340 * 10⁶ km³
1 340 * 10⁶ * 10¹² = 1,34 * 10²¹ L
35 * 1,34 * 10²¹ * 10⁻⁶ = 4,69 * 10¹⁶ tonnes de sel
c) 1 340 * 10⁶ km³ = 1,340 * 10²¹ L
1,340 * 10²¹ * 10⁻¹⁸ = 1 340 exalitres