can someone help me on the 2nd one ?!

Answer:
Car A's speed is 25 miles per hour.
Car B's speed is 75 miles per hour.
Step-by-step explanation:
In one-hour's time, Car A moves 25 miles, so its speed is 25 mph.
In one-hour's time, Car B moves 75 mles, so its speed is 75 mph.