Saturday

July 26, 2014

July 26, 2014

Posted by **Nerd101** on Tuesday, February 15, 2011 at 4:03am.

- Math -
**Reiny**, Tuesday, February 15, 2011 at 10:07amAverage speed = total distance/total time

time for first leg = 8/5 hrs

time for 2nd leg = 2/7 hours

total time = 8/5 + 2/7 or 66/35

avg speed = 10/(66/35) = 10(35/66) = 5.3 mph

**Related Questions**

Math - Runner A crosses the starting line of a marathon and runs at an average ...

math - 11. Runner A crosses the starting line of a marathon and runs at an ...

Math - Runner A crosses the starting line of a marathon and runs at an average ...

Math - 6. Columbus' ships covered approximately 144 miles a day. How many miles ...

math - substitute to find the value of the expression. A train must cover a ...

math - andys average driving speed for a 4-hour trip was 45 miles per hour. ...

physics - two runners who live 10 miles apart leave home and start running ...

math - A marathon runner ran 26.2 miles in 2 h 30 min. Find these rates: a. ...

math - A woman drove to work at an average speed of 40 miles per hour and ...

Math - 6. Columbus' ships covered approximately 144 miles a day. How many miles ...