Answer: The wavelength is 3.33 km, the unit is km.
Step-by-step explanation:
1) Data:
a) λ = ?
b) v = 10 km/s
c) f = 3 Hz = 3 s⁻¹
2) Formula:
wave equation: v = f × λ
3) Solution:
a) Solve for λ
λ = v / f
λ = (10 km/s ) / 3 s⁻¹
λ = 3.33 km
The wavelength is 3.33 km, the unit is km.