A wave has a wavelength of 10mm and a frequency of 5 hertz what is the speed

Answer Are
55 mm/s
50 hertz
2 mm/s thank you

3 answers

Velocity = Frequency * Wavelength

V = 5 hertz * 10 mm
V = ?

I'll let you finish.
i need this too and assuming that the formula is as above, multiply em, then the answer would be 50 sum but ofc there is two answers with 50 in them with 2 different units so gr8 (((:
this site is super unhelpful bruh
i am stupid and cant find the answer