there is a 1 km long wire placed on some number of poles which are in equal distance . if the number of poles is reduced by 1 then the distance of wire between each poles increases 1 ( 2 / 3 ) . how many poles are there initially .
26 answer : c
add(divide(multiply(multiply(multiply(divide(2, 3), add(1, 1)), 3), const_12), 2), 2)