Question 389099
Rate is distance (given in units such as miles, feet, kilometers, meters, etc.) divided by time (hours, minutes, seconds, etc.). Rate can always be written as a fraction that has distance units in the numerator and time units in the denominator, e.g., 25 miles/1 hour.

If it travels 3 miles in 20 minutes, then it travels 6 miles in 40 mintues.
Now, you still  have 5 minutes left over, so:
R=D/T

(3)/(20)

The approximate value of (3)/(20) is 0.15.
0.15

Now. you need to figure out for 45 minutes so:

0.15*45

Multiply 0.15 by 45 to get 6.75.
6.75

You can easily check this by simply multipying the original:
0.15*20

Multiply 0.15 by 20 to get 3.
3 miles


Your answer, as noted above = 6.75 miles traveled