Answer:
the answer is 7/30 (answer is .23 repeating)
 
        
             
        
        
        
None are left over, as 345/23 = 15, or 15 pieces of paper per classmate.
        
             
        
        
        
The answer is C. I got this by doing a^2 + b^2= c^2. 50^2 + 16^2=c^2, 2500 + 256 = c^2, 2756 = c^2, then you take the square root of 2756 and that gives you your answer 52.50 yards. Hope this helps :D