1. A rope is 10 meter long. Now we need to tie a gift box with a length of 20 cm, a width of 15 cm and a height of 12 cm. If the rope at the joint is 30 cm, how many such gift boxes should be tied? (20+ 15+ 12)* 4+8 * 30 = 428cm 1000/428 = 2。 Two pairs of twos A steel finance minister 20 was cut off for the first time. How many meters? How much/how much? Cut 20/3 meters for the first time and 40/3 meters for the second time.