Question

it took marjorie 15 minutes to drive from her house to her daughter's school. If the school was 4 miles away from her house, what was her unit rate of speed?

Answer 1

unit rate of speed is 0.27 miles per minute .

Step-by-step explanation:

Here we have , it took marjorie 15 minutes to drive from her house to her daughter's school. If the school was 4 miles away from her house, We need to find  what was her unit rate of speed . Let's find out:

We know that  , $Speed = \frac{Distance}{Time}$      ...........(1)

According to question we have following parameters as :

$Distance = 4 miles\\Time=15min$

Putting these value in equation (1) we get:

⇒ $Speed = \frac{Distance}{Time}$

⇒ $Speed = \frac{4miles}{15min}$

⇒ $Speed = (\frac{4}{15} )\frac{miles}{min}$

⇒ $Speed = (0.27 )\frac{miles}{min}$

Therefore ,  unit rate of speed is 0.27 miles per minute .