SOLUTION: Two towns, Here and There are 120 km apart. Cara Van wants to drive from Here to There in exactly one hour and twenty minutes. For the first 30 minutes, Cara drives at a constant r

Question 958394: Two towns, Here and There are 120 km apart. Cara Van wants to drive from Here to There in exactly one hour and twenty minutes. For the first 30 minutes, Cara drives at a constant rate of 70 km/h.
At what constant rate, in km/h must she drive for the remaining time if she is to accomplish her goal of getting from Here to There in exactly one hour and twenty minutes?
Found 2 solutions by josgarithmetic, MathTherapy:
Answer by josgarithmetic(39617) (Show Source): You can put this solution on YOUR website!
_____________________speed___________time_________distance
Part1_________________70_____________1/2__________(____)
Part2_________________r______________1____________(____)
Total________________________________________120

The part2 time of 1 hour comes from the necessary total time being hours.

Next, fill the missing cells and formulate the distance equation.

_____________________speed___________time_________distance
Part1_________________70_____________1/2__________
Part2_________________r______________1____________
Total__________________________________________120

Answer by MathTherapy(10552) (Show Source): You can put this solution on YOUR website!

Two towns, Here and There are 120 km apart. Cara Van wants to drive from Here to There in exactly one hour and twenty minutes. For the first 30 minutes, Cara drives at a constant rate of 70 km/h.
At what constant rate, in km/h must she drive for the remaining time if she is to accomplish her goal of getting from Here to There in exactly one hour and twenty minutes?

Rate to travel in order to accomplish a time of hours: km/h
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