Answer:
27
Step-by-step explanation
 If your trying to find the bracelets 
 
        
             
        
        
        
Answer:
If the long side is down then the length of the base is 81 sq.m.
If the short side is down then the length of the base is 20.25 sq.m.
Step-by-step explanation:
162/4 is 40.5 that means if this were a square it would be 40.5 sq.m. On each side, if the base is longer you multiply 40.5 by 2 (or whatever youre supposed to honestl) and if the base is shorter you divide by 2 (or whatever you were supposed to)
 
        
             
        
        
        
Average speed = (1/2) (beginning speed + ending speed)
                          = (1/2)        ( 13 m/s  +  30 m/s )
                          =    (1/2)        ( 43 m/s )
                          =        21.5 m/s