SOLUTION: Melissa and kyle went on strip to visit relatives.On the way there.M drove and average about 34 mph, on the way home, k drove about 50 mph. Total drive time was 21 hours, how long

Algebra ->  Customizable Word Problem Solvers  -> Travel -> SOLUTION: Melissa and kyle went on strip to visit relatives.On the way there.M drove and average about 34 mph, on the way home, k drove about 50 mph. Total drive time was 21 hours, how long       Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

Question 1006521: Melissa and kyle went on strip to visit relatives.On the way there.M drove and average about 34 mph, on the way home, k drove about 50 mph. Total drive time was 21 hours, how long did M drive, how long did K drive?
Found 2 solutions by josgarithmetic, MathTherapy:
Answer by josgarithmetic(39626) About Me  (Show Source):
You can put this solution on YOUR website!
Travel rates rule, RT=D relates speed, time, distance. 
 
                 speed      time        distance

Melissa           34          d%2F34           d

Kyle              50          d%2F50           d

Total                         21

Answer by MathTherapy(10556) About Me  (Show Source):
You can put this solution on YOUR website!
Melissa and kyle went on strip to visit relatives.On the way there.M drove and average about 34 mph, on the way home, k drove about 50 mph. Total drive time was 21 hours, how long did M drive, how long did K drive?
Let time Melissa drove be T

Then time Kyle drove = 21 – T

We then get: 34T = 50(21 – T)

34T = 1,050 – 50T

34T + 50T = 1,050 

84T = 1,050

T, or time Melissa drove = 1050%2F84, or highlight_green%2812.5%29 hours

Therefore, Kyle drove: 21 – 12.5, or highlight_green%288.5%29 hours