Carl and Mike start a 3 mile race at the same time If Mike r

Carl and Mike start a 3 mile race at the same time. If Mike ran the race at 6 miles per hour and nishes the race 10 minutes before Carl, how fast does Carl run?

Solution

We use r.t = d
First find Mike\'s time ....6t = 3....t = 1/2 hour or 30 min.
Therefore Carl needed 40 min or 2/3 hour
(2/3)r = 3....r = 9/2 mph or Carl rate was 4 1/2 mph, which is slower than Mike