SOLUTION: The Jones family drove to Disneyland at 50 miles per hour and retruned on the same route at 40mph. Find the distance to Disneyland if the total driving time was 7.2 hours

Question 140585This question is from textbook Beginning Algebra
: The Jones family drove to Disneyland at 50 miles per hour and retruned on the same route at 40mph. Find the distance to Disneyland if the total driving time was 7.2 hours This question is from textbook Beginning Algebra

Answer by ptaylor(2198) (Show Source): You can put this solution on YOUR website!
Distance(d) equals Rate(r) times Time(t) or d=rt; r=d/t and t=d/r
Now we know that distance going=distance returning =d
time going=d/50
time returning=d/40
We are told that the above two times add up to 7.2 hr, so:
d/50+d/40=7.2 multiply each term by 200
4d+5d=1440
9d=1440 divide each side by 9
d=160 mi-------------------------------distance to Disneyland
CK
160/50 + 160/40=7.2
3.2 + 4=7.2
7.2=7.2

Hope this helps---ptaylor

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