In a garden , there are 10 rows and 12 columns of mango trees. the distance between the two trees is 2 m and a distance of one meter is left from all sides of the boundary of the length of the garden is :

• length of garden = 1+2*11+1= 24 m
  breadth of garden = 1+9*2+1= 20 m
  
  area = 24*20 =480 sq mtrs
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