As shown in the figure is a funnel-shaped iron pipe joint, its bus length is 35cm, the two bottom diameters are 50cm and 20cm, and 10000 such joints are made

As shown in the figure is a funnel-shaped iron pipe joint, its bus length is 35cm, the two bottom diameters are 50cm and 20cm, and 10000 such joints are made

Because the funnel-shaped iron pipe joint is actually a cone shape, the iron sheet used in the calculation is to calculate the side product s of the cone, and the side expanded view of the cone is a fan ring. Suppose the height of the truncated cone of the cone is x, (35 + x) / x = 50 / 20, the solution is: x = 70 / 3, the side product s of the cone = (x + 35) 2 * 50 * π / 2-x * 2 * 20 * π / 2 = 2450 π C