Respuesta :

Step-by-step explanation:

Given-

5.1 km/hr

Relation bween mph and km :-

[tex]1 \: mph = 1.609 \: km[/tex]

So,

[tex] \frac{5.1 \: km}{1 \: h} \times \frac{1 \: km}{1.609} = 3.17 \: mph[/tex]

Therefore, the answer is 3.17 mph.