car moves with speed of 80m/s to go from city A to city B for 12 hours. How long will it take to move car with speed of 60 m/s?

16 hours

Step-by-step explanation:

velocity = distance / time = > distance = velocity * time;

distance = 80 m/s * 12 hours

newVelocity = 60 m/s;

newVelocity = distance / newTime = > newTime = distance / newVelocity = 80 m/s * 12 hours / (60 m/s) = (8/6) * 12 hours = 16 hours