1. The side length of a square is two seventh of a meter, its perimeter is () decimeter, and its area is () square decimeter 1. The side length of a square is 2 / 7 decimeters, its perimeter is () decimeters, and its area is () square decimeters. 2, 1.2 are more than its reciprocal. 3. There is a basket of apples. After two-thirds of the apples are sold, another 4kg is sold. At this time, there are still 16KG left. This basket of apples is originally () kilogram
8/7 4/49
11/30
(16 + 4) / (1-2 / 3) = 60kg