Saturday

April 18, 2015

April 18, 2015

Posted by **John** on Monday, May 24, 2010 at 7:13pm.

David flew 300km on a commuter plane, then 2000km on a passenger jet. The passenger jet flew twice as fast as the commuter plane. The total flying time for the journey was 3.25 hours. What was the speed of each plane, in kilometers per hour?

Please help. I've been trying to tackle this problem for an hour+ and had no luck solving it.

- Math (URGENT) -
**Reiny**, Monday, May 24, 2010 at 7:49pmlet the speed of the commuter plane be x km/h

then the speed of the passenger jet is 2x km/h

300/x + 2000/2x = 3.25

300/x + 1000/x = 3.25

1300/x = 3.25

3.25x = 1300

x = 1300/3.25 = 400

so ......

**Answer this Question**

**Related Questions**

algebra 1 - A passenger plane and a jet leave att the same time from the same ...

maths - A passenger plane and a jest leave at the same time from the same ...

Math (Ms. Sue Please help!) - A plane on a search mission flew east from an ...

Math - A plane on a search mission flew east from an airport, turned, and flew ...

Anyone Please Help! - A plane on a search mission flew east from an airport, ...

trig - A plane climbs into the jet stream which is flowing at a rate of 80 miles...

trig - jet stream which is flowing at a rate of 80 miles per hour. It travels ...

MATH - Travel Time A company president flew 680 miles one way in the corporate ...

Algebra: 8th Grade; Equation Check - 1) A private airplane leaves an airport and...

Math - An airplane flies 500 mi/h in still air. Flying with the jet stream, the ...