SOLUTION: Pa got in his '29 Ford and started driving west from Jackson at a constant speed of 30 miles per hour. An hour later Ma got in her '31 Buick and started driving west from Jackson a

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: Pa got in his '29 Ford and started driving west from Jackson at a constant speed of 30 miles per hour. An hour later Ma got in her '31 Buick and started driving west from Jackson a      Log On


   

Question 305442: Pa got in his '29 Ford and started driving west from Jackson at a constant speed of 30 miles per hour. An hour later Ma got in her '31 Buick and started driving west from Jackson at a constant speed. After driving 4 hours Ma had passed Pa and was 10 miles ahead of him. How fast was Ma driving?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Ma's distance=Pa's distance+Distance he covered in 1 hour+10 miles.
Distance = Rate*Time
Let M be Ma's rate,
M%2A4=30%2A4%2B30%2B10
M%2A4=120%2B30%2B10
M%2A4=160
M=40
Ma's traveling at 40 mph.