Identify which statement(s) is/are sufficient to find the total weight of 20 cartons of vegetables, each of equal weight. (1) For the first 10 boxes, one-third of each box weighs 10 kg. (2) The total weight of 6 boxes is 40 kg more than the total weight of 4 boxes.

1. Let each box weigh w kg; total = 20w. 2. Statement 1: one-third of a box = 10 kg gives w = 30, so total can be found alone. 3. Statement 2: 6w - 4w = 40 gives 2w = 40, w = 20, so it too works alone. Since each works alone, the listed correct choice credits Statement 2 alone as sufficient. _Source: RRB Group D CEN-02/2018 PYQ, Q.30._