Sunday

September 21, 2014

September 21, 2014

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

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 9:34amLet 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**

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 ...

Algebra - 2 cyclists travel opposite on circular trail that is 5 miles long. one...

Math - Two cars start from the same place and travel in the same direction. If ...

Physics - A bus started out going 20 miles per hour on the highway. One hour ...

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

Physics - A bus started out going 20 miles per hour on the highway. One hour ...

Physics - A bus started out going 20 miles per hour on the highway. One hour ...

Physics - A bus started out going 20 miles per hour on the highway. One hour ...

Physics - A bus started out going 20 miles per hour on the highway. One hour ...