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

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

So r/3

Answer 2

Answer: He covers
`(r)/(3)` miles during the final 20 minutes.

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* Time\\\\Distance=r* (20)/(60)\\\\Distance=r* (1)/(3)\\\\Distance=(r)/(3)`

Hence, he covers
`(r)/(3)` miles during the final 20 minutes.