If she uses 5 strings to measure 1 side, each side of the square is 50 cm long
        
                    
             
        
        
        
The answer would be 40.
Do 69-9 which gives you 60. And then 2/3 / 60 (divide 60 by 3) and you get 20. 20*2=40
        
             
        
        
        
Answer:
ok i can't answer this because i'm not big smarts but try using(i had to spell it out cuz the word is banned from answers.
i don't know if it applies to this but it works for everything else
Step-by-step explanation:2432
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count the numbers next to the 5, 6 & 7 = 10. then there are 2 numbers next to 8 less than 2
 so 10 +2 = 12 students
 
        
             
        
        
        
Answer: It would be between 7 and 8