1 . In a garden, there are 10 rows and 12 columns of trees. The distance between any two trees is 2 m and a distance of 1m is left from all sides of the boundary of the garden. What is the length of the garden?

• A. 20 m
• B. 22 m
• C. 23 m
• D. 24 m
• D. None of these

Answer: Option A

Explanation:

11  ×  2  =  22 m, 1 m is left from the upper and lower side.
So length of the garden  =  22 - 2  =  20m
No, of now is less than no of column, so length of column is the length of the garden.