The answer is B hope this helped
 
        
             
        
        
        
<h3>
Answer:  72 words per minute</h3>
Work Shown:
1 hour = 60 min
2 hours = 120 min (multiplied both sides by 2)
2 hours + 30 min = 120 min + 30 min = 150 min
speed = (number of words typed)/(time taken)
speed = (10800 words)/(150 min)
speed = (10800/150) words per minute
speed = 72 words per minute
 
        
        
        
X=2 . HOPE THIS HELPED !!!!