SOLUTION: Two trains depart from the station. The first train goes to west and second train goes to north. First train runs faster 5km/ph than second. If, after 2 hours both trains are at th

Algebra ->  Customizable Word Problem Solvers  -> Travel -> SOLUTION: Two trains depart from the station. The first train goes to west and second train goes to north. First train runs faster 5km/ph than second. If, after 2 hours both trains are at th      Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

Question 997238: Two trains depart from the station. The first train goes to west and second train goes to north. First train runs faster 5km/ph than second. If, after 2 hours both trains are at the distance of 50km then what will be the average speed of trains? ...
A-15/10km
B-20/15km
C-20/25km
D-25/30km
Answer by josgarithmetic(39616) About Me  (Show Source):
You can put this solution on YOUR website!
Right triangle with the Right angle at departure point.

Speeds are r and r+5, and the time quantity is 2 hours, and the hypotenuse is 50 kilometers.

Pythagorean Theorem Formula for the description's Right Triangle: %28r%2A2%29%5E2%2B%28%28r%2B5%29%282%29%29%5E2=50%5E2

The question is not very clear. It seems to mean the average of r and r+5. This would be, before solving for r,
%28r%2B%28r%2B5%29%29%2F2.