in a garden , there are 10 rows and 13 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 . the length of the garden is
"explanation : each row contains 13 plants . there are 12 gapes between the two corner trees ( 12 x 2 ) metres and 1 metre on each side is left . therefore length = ( 24 + 2 ) m = 26 m . answer : d"
add(add(multiply(subtract(13, const_1), 2), divide(10, 2)), divide(10, 2))