Question

Stan drove for h hours at a constant rate of r miles per hour. How many miles did he cover during the final 20 minutes of his drive?

Answer 1

Answer: He covers $\dfrac{r}{3}$ miles during the final 20 minutes.

Step-by-step explanation:

Since we have given

Speed of Stan drove for h hours = r miles per hour

If the time taken by him = 20 minutes

Then, we need to find the number of miles he drove.

As we know the formula for " Time and Distance":

$Distance=Speed\times Time\\\\Distance=r\times \dfrac{20}{60}\\\\Distance=r\times \dfrac{1}{3}\\\\Distance=\dfrac{r}{3}$

Hence, he covers $\dfrac{r}{3}$ miles during the final 20 minutes.

Answer 2

rDistance (D) = Speed (S) * Time (T)
S * T = r*20/60 mins = r / 3

So r/3