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 answer : c"
add(add(multiply(subtract(12, const_1), 2), divide(10, 2)), divide(10, 2))