SOLUTION: Hanson drove 200 kilometers at x km/hr and then decreased his speed 20 km/hr and drove 240 extra kilometers. Make a table like the one in problem 87. Write a rational expression

Question 335644: Hanson drove 200 kilometers at x km/hr and then decreased his speed 20 km/hr and drove 240 extra kilometers. Make a table like the one in problem 87. Write a rational expression for his total traveling time. Evaluate that expression for x = 100 km/hr.
Answer by nyc_function(2741) (Show Source): You can put this solution on YOUR website!
qa
let total travelling time = t hrs , then
t = 200/x + 240/(x-20)
qb
when x = 100 m/hr,
t = 200/100 + 240/80
= 2 + 3
= 5 hr
I hope this helps.
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