SOLUTION: St. Louis and Portland are 2060 miles apart. A small plane leaves Portland traveling toward St. Louis at an average speed of 90mph. Another plane leaves St. Louis at the same time

Algebra ->  Customizable Word Problem Solvers  -> Travel -> SOLUTION: St. Louis and Portland are 2060 miles apart. A small plane leaves Portland traveling toward St. Louis at an average speed of 90mph. Another plane leaves St. Louis at the same time       Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


   



Question 919401: St. Louis and Portland are 2060 miles apart. A small plane leaves Portland traveling toward St. Louis at an average speed of 90mph. Another plane leaves St. Louis at the same time traveling toward Portland averaging 160mph. How long will it take them to meet?
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
D%2F160+=%282060-D%29%2F90
90D= 2060*160 - 160D
250D = 2060*160
D = 2060*160/250 = 1318.4mi
t = 1318.4%2F160 = 8.24hr