SOLUTION: a commercial jet and a private airplane leave the same airfield at the same time and travel in opposite directions at average speeds of 880 km/h and 450 km/h, respectively. In how

Algebra ->  Equations -> SOLUTION: a commercial jet and a private airplane leave the same airfield at the same time and travel in opposite directions at average speeds of 880 km/h and 450 km/h, respectively. In how       Log On


   

Question 896040: a commercial jet and a private airplane leave the same airfield at the same time and travel in opposite directions at average speeds of 880 km/h and 450 km/h, respectively. In how many minutes will they be 1463 km apart? Use the equation r * t = d to help. Also, use let statements.
Answer by josgarithmetic(39623) About Me  (Show Source):
You can put this solution on YOUR website!
Two planes, opposite directions, same departure time.

____________________speed_________time__________distance
commercial__________880____________t______________880t
private_____________450____________t______________450t
Total____________________________________________1463

Understand that the two vehicles are separating at the rate of 880%2B450=1330 kilometers per hour.

The equation to solve is 880t%2B450t=1463
1330t=1463
t=1463%2F1330
highlight%28t=1.1%29 hours

This time length is 1 hour 6 minutes.