Kubikmeter in Kubikkilometerumrechnung unklar

Question

warum sind 20 m³ 2* 10^-8 km³ ???

Answer 1

1 km = 1000 m

1 km^2 = 1 km * 1 km = 1000 m * 1000 m = 1000000 m^2

1 km^3 = 1 km * 1 km * 1 km = 1000 m * 1000 m * 1000 m = 1000000000 m^3 = 10^9 m^3


20 m^3 = 20 * 10^{-9} km^3 = 2 * 10^{-8} km^3