Rearrange your formula for distance rate and time, then set up a proportion with the rates from the two different scenarios equal to each other.
G
Practice makes perfect
When asked about distance, rate, or time, the first thing we should consider is the d=rt formula. In this case, we know the rates for 4 miles and for 19 miles is the same. First, let's rearrange our formula to solve for r.
d=rt ⇔ r=d/t
Now, let's set up an expression for the rate when Myron drives a distance of 4 miles in a time of m minutes.
r=d/t ⇒ r= 4/m
Next, we can set up an expression for r when he travels 19 miles in x minutes.
r=d/t ⇒ r= 19/x
Since we know the rates are the same, we can set the two different expressions for r equal to each other and solve for x.
