To warm up, coach hadley had his swim team swim nine 50-meter long laps. it took the team 5 minutes to finish the warm up. how fast did the team swim in centimeters per second?

This doesn’t make sense to me it’s supposed to be lcm ( least common multiple )

Acar started driving from city a to city b, distance between which is 620 miles, at a rate of 60 mph. two hours later a truck left city b and started moving towards city a at a rate of 40 mph. how many hours after the truck's departure will the two meet?

In angle pqr find the measure of