Posted by **jean** on Tuesday, September 13, 2011 at 12:01am.

John's father works in Franklin. It is 39 miles from Franklin to his home. If he leaves work at 7:20 P.M.and travels an average speed of 43 m/hr., at what time will he get home?

Please explain.

- math -
**Bob**, Tuesday, September 13, 2011 at 12:18am
Distance = rate * time

39 miles is the "Distance" from Franklin to his home, and 43 m/hr is his "rate" of travel. You are trying to figure out the "time" it takes for him to get home traveling at this "Distance" and "rate".

Switch the Distance formula around for "time" and plug the numbers in:

time = Distance/rate

time = 39 miles/43 mph

time = .09 hours

- math -
**Bob**, Tuesday, September 13, 2011 at 12:23am
Woops. I accidentally wrote .09 instead of .907

However, the actual answer is just the result of the distance divided by the rate (aka whatever 39/43 is).

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