Sunday

December 21, 2014

December 21, 2014

Posted by **donna** on Sunday, March 7, 2010 at 10:14pm.

- math -
**Reiny**, Sunday, March 7, 2010 at 10:50pmtime for first trip = 100/48 hours = 25/12 hrs

time for return trip = 100/40 = 5/2 hours

total time = 5/2 + 25/12 hours = 55/12 hrs

avg speed = total distance / total time

= 200/(55/12) = 43.64 mph

**Answer this Question**

**Related Questions**

Algebra - A truck driver traveled at an average speed of 58 miles per hour on a ...

College Algebra - A truck driver traveled at an average speed of 55 miles per ...

calculus - Suppose that the cost of operating a truck in Mexico is cents per ...

Math/ Calculus Please HELP!!! - A truck driver, on assignment from the owner of ...

Calculus/ Optimization - A truck driver, on assignment from the owner of the ...

math - Mark averaged 60 miles per hour during the 30-mile trip to college. ...

math - A truck drove 1400 miles at a rate twenty miles per hour slower on the ...

MATh - Kesha dove from Buffalo to Syracuse at an average rate of 48miles per ...

college algebra - a bus driver wants to average at least 40 miles per hour on a ...

MATh (distance) - Kesha dove from Buffalo to Syracuse at an average rate of ...