 
       
      
    Q 13. Find the cost of fencing a square park of side 250 m at the rate of rupees 20 per metre.
 
                
                  Given that,
Length of the square park  = 250 m
Cost of fencing = rs. 20 per meter
Therefore, the Perimeter of the square park =
= 4  250
=1000 m
= 1km
So, total cost = 20   1000 = 20,000 Rs
 
                