Use a 96cm long wire to make a cuboid frame. The ratio of length to width is 5:4:3. What is the surface area of the cuboid? There are also two questions, a batch of seeds do germination test, the first time, 100 seeds germinate 80 seeds, the germination rate is 80%, the second time, 200 seeds germinate 180 seeds, the germination rate is 90%, from this, how much is the germination rate of this batch of seeds? 4 / 5 of the number a is equal to 2 / 3 of the number B, then a: B is equal to several? There is a process

Use a 96cm long wire to make a cuboid frame. The ratio of length to width is 5:4:3. What is the surface area of the cuboid? There are also two questions, a batch of seeds do germination test, the first time, 100 seeds germinate 80 seeds, the germination rate is 80%, the second time, 200 seeds germinate 180 seeds, the germination rate is 90%, from this, how much is the germination rate of this batch of seeds? 4 / 5 of the number a is equal to 2 / 3 of the number B, then a: B is equal to several? There is a process

Use a 96cm long wire to make a cuboid frame. The ratio of length to width is 5:4:3. What is the surface area of the cuboid?
The sum of the length, width and height of the cuboid is 96 / 4 = 24 cm
The length of cuboid = 24 * 5 / (5 + 4 + 3) = 120 / 12 = 10 cm
The width of cuboid is 24 * 4 / (5 + 4 + 3) = 96 / 12 = 8 cm
The height of cuboid = 24 * 3 / (5 + 4 + 3) = 72 / 12 = 6cm
The surface area of the cuboid = (10 * 8 + 10 * 6 + 8 * 6) * 2
=188*2、
=376 square centimeters
A batch of seeds were tested for germination. In the first time, 100 seeds germinated, 80 seeds germinated, and the germination rate was 80%. In the second time, 200 seeds germinated, 180 seeds germinated, and the germination rate was 90%?
（80+180）/（100+200）
=260/300
=13/15
=86.67%
4 / 5 of a is equal to 2 / 3 of B, then a: B is equal to what ratio?
A: B = (2 / 3): (4 / 5) = 10:12 = 5:6

Master Wang uses a 96cm long iron wire to make a cuboid frame, so that the ratio of length to width is 2:1:3. What is the volume and surface area of the cuboid?

Length + width + height = 96 △ 4 = 24 (CM)
2+1+3=6
Length = 24 △ 6 × 2 = 8 (CM)
Width = 24 △ 6 × 1 = 4 (CM)
Height = 24 △ 6 × 3 = 12 (CM)
Volume = 8 × 4 × 12 = 384 (cm3)
Surface area = (8 × 4 + 4 × 12 + 12 × 8) × 2 = 352 (cm2)

With a 120cm long wire, you can just circle a 12 cm long, 10 cm wide and how many cm high rectangular teaching aid

Height = 120 △ 4-12-10
=30-12-10
=8 cm
A: the height is 8 cm