28-29 Time Rates: Two cars driving on roads that intersects at 60 degree

28-figure-48.jpgProblem 28
At noon a car drives from A (Fig. 48) toward C at 60 miles per hour. Another car starting from B at the same time drives toward A at 30 miles per hour. If AB = 42 miles, find when the cars will be nearest each other.

Solution 28


Problem 29
Solve Problem 28 if the car from B leaves at noon but the car from A leaves at 12:07 PM.

Solution 29