Saturday

January 31, 2015

January 31, 2015

Posted by **LIbby** on Monday, April 2, 2012 at 11:10pm.

averages 60 miles per hour and the other averages 80 miles per hour. After how long will they

be 420 miles apart?

- Algebra -
**Reiny**, Monday, April 2, 2012 at 11:43pmThey each travel for t hours

distance covered by first train = 60 t miles

distance covered by 2nd train = 80t miles

60t+80t = 420

140t = 420

t = 3

3 hours.

**Answer this Question**

**Related Questions**

math - two airplanes left the same airport traveling in opposite direction. if ...

Algebra - Two trains leave Raleigh at the same time, one traveling north, the ...

College Algebra - two trains leave a train station at the same time. One travels...

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

algebra 2 - two trains leave the dallas port going in opposite directions. if ...

math algebra - Two trains leave the station at the same time, one heading east ...

Algebra - Two cars start at the same point at Alexandria, verginia, and travel 2...

Math - Two trains leave a train station at the same time. One travels east at 11...

math - Two trains leave a train station at the same time. One travels east at 10...

Trigo - Two men travelling in opposite directions at the rate 18 and 22 miles ...