How many square decimeters of iron sheet should be used to make this bucket? The radius is 50 cm and the height is 50 cm

How many square decimeters of iron sheet should be used to make this bucket? The radius is 50 cm and the height is 50 cm

Calculate the bottom area of the bucket: 5x50x3.14 = 7850 (square centimeter)
Find the circumference of the bottom of the bucket: 50x2x3.14 = 314 (CM)
Calculate the side area of the bucket: 314x50 = 15700 (square centimeter)
How much iron is used for bucket 15700 + 7850 = 23550 (square centimeter)

It is known that the bottom of the barrel is a square with a side length of 4 decimeters, and how high is the barrel?

(192-4 × 4) △ 4 △ 4 = (192-16) △ 4 △ 4 = 176 △ 4 △ 4 = 44 △ 4 = 11 (decimeter) a: the barrel height is 11 decimeters

To make a cuboid tin bucket without a cover, the bottom is a square with a side length of 4 decimeters and a height of 5 decimeters. How many square decimeters of tin do you need to make this bucket?

4 × 4 + 4 × 5 × 4 = 16 + 80 = 96 (square decimeter) a: this bucket needs at least 96 square decimeters of iron sheet