physics kinematics

A red car and green car , identical except for their colours move towards each other in adjacent lanes . At time=0 , the red car is at x=0m and the green car is at x=220m . If the red car has a constant velocity of 20km/h the cars will meet AR x=44.5m and if it has a constant velocity of 40km/h they will pass one another at x=76.6m

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