# The two cars

**Calculus**Level 3

Two cars \(A\) and \(B\) are in the vertex of two highways, forming an angle of \(60°\). The car \(A\) goes straight at a constant velocity of \(25 m/s\). After \(15\) seconds, the car \(B\) starts at a constant acceleration of \(4 m/s^2\). Find the velocity (in \(km/h\)) in which the two cars separate after \(25\) seconds the first car started.