Posted by **mich** on Wednesday, August 17, 2011 at 12:43am.

Two drivers travel 150 miles on a

freeway and then stop at a wayside rest area. The

first driver travels 5 miles per hour faster and arrives

1/7 hour ahead of the second. Find the average speed

of each car.

- algebra -
**drwls**, Wednesday, August 17, 2011 at 9:34am
Let the speed of the faster car be V. The other is then V - 5 (in mph)

The travel times are 150/V and 150/(V-5)

150/(V-5) - 150/V = 1/7 hour

Solve that equation for V. That will require solving a quadratic. I'd prefer to take a guess or two.

If V = 75,

2.143 - 2.000 = 0.143 = 1/7

Therefore the speeds are 75 and 70 mph

## Answer This Question

## Related Questions

- college algebra - a bus driver wants to average at least 40 miles per hour on a ...
- maths - A motorist travels 120 miles to his destionation at an average speed of ...
- Math - A small truck is to be driven 300 miles on a freeway at a constant speed ...
- math,algebra - can someone just set up the equations for me for this problem. ...
- Math - On a trip of d miles to another city, a truck driver's average speed was ...
- math - Currently, the Toyota Corolla is the best selling car in the world. ...
- math - Currently, the Toyota Corolla is the best selling car in the world. ...
- Math College 115 - A hiker can walk 2 miles in 43 minutes. What is his average ...
- math - (AIR TRAVEL) Two jets bound for Dammam leave Jeddah 30 minutes apart. The...
- math - (AIR TRAVEL) Two jets bound for Dammam leave Jeddah 30 minutes apart. The...

More Related Questions