Question

write 171 miles in 3 hours as a unit rate

Answer 1

Speed is distance traveled per unit time 

R equals D / T 

R equals (171 mi) / (3 hr) 

R equals 57 mi/h (mph)

or

171/3 gives MPH

Answer 2

Write 171 miles in 3 hours as a unit rate

Unit rate is nothing but the speed

We know the distance formula

Distance = Speed * Time

$speed = \frac{Distance}{Time}$

Given distance = 171 miles , Time = 3 hours

$speed = \frac{171 miles}{3hour}=57\frac{miles}{hour}$

Unit rate is $57\frac{miles}{hour}$