In a garden, there are 10 rows and 12 columns of mango trees. The distance between the two trees is 2 metres and a distance of one metre is left from all sides of the boundary of the garden. What is the length of the garden?  Choose the correct choice from the following answers:
A) 22 B) 24 C) 26 D) 28 E) 30
Between the 12 mango trees, there are 11 gaps and each gap has 2 meter length   Also, 1 meter is left from all sides of the boundary of the garden.   Hence, length of the garden = (11 × 2) + 1 + 1 = 24 meter   Answer is 24.
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In a garden, there are 10 rows and 12 columns of mango trees. The distance between the two trees is 2 metres and a distance of one metre is left from all sides of the boundary of the garden. What is the length of the garden?