total distance covered per second
= 7.2 + 8.4 = 15.6 meters/s
time = 3120/15.6 seconds to collision
That is all you need.
The distance between Caroline's house and Laura's house is 3120m Carolina and Laura leave their house at the same time the two girls cycle towards each other until they meet Caroline speed is 7.2 meters per second and Laura Speed is 8.4 meters per second a how long do the girls have to ride before they need be what is the distance between Caroline's house and where the girls meet show all your work you do to arrive at your solution and explain your reasoning
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