In the diameter of 1.5 meters round table cloth around a lace, joint 5 cm, this lace length______ Rice

In the diameter of 1.5 meters round table cloth around a lace, joint 5 cm, this lace length______ Rice


According to the meaning of the title, C = π D, = 3.14 × 1.5, = 4.71 (m); 5cm = 0.05m; 4.71 + 0.05 = 4.76 (m); so the answer is: 4.76



The radius of a tabletop is 0.9 meters. Make a tablecloth according to the size of the tabletop and inlay it with lace


Lace length 2x0.9x3.14 = 5.652m



There are five square tablecloths, each with a side length of 9 decimeters. How many decimeters of lace are needed to pin lace around these tablecloths? How many meters?


9 × 4 × 5 = 180 (decimeter), 180 decimeter = 18 meters. Answer: a total of 180 decimeters of lace is needed, which is 18 meters