Final answer:
The speed of the cheetah running 300 yards in 10 seconds is 30 yards per second.
Step-by-step explanation:
The speed of a cheetah running 300 yards in 10 seconds can be calculated by dividing the distance by the time taken. Therefore, the speed is 300 yards / 10 seconds = 30 yards per second. So the correct answer is a. 30 yards per second.