A cylindrical steel with a circumference of 12.56 cm at the bottom and a height of 125 cm is cast into a square steel with a cross section of 10 cm at the side

A cylindrical steel with a circumference of 12.56 cm at the bottom and a height of 125 cm is cast into a square steel with a cross section of 10 cm at the side


one thousand five hundred and eighteen



Cut a rectangular steel plate 24 decimeters long and 6 decimeters wide into four square steel plates. How many decimeters is the perimeter of each square?


Cut a rectangular steel plate 24 decimeters long and 6 decimeters wide into four square steel plates, and the side length of each square is:
24 △ 4 = 6 (decimeter)
The perimeter of each square is:
6 × 4 = 24 (decimeter)



Uncle Li wants to forge a cylindrical steel embryo with a bottom circumference of 31.4cm and a height of 12cm into a cylindrical part with a bottom radius of 3cm
What's the height, M?


31.4÷3.14=10cm
5 × 12 = 942 cm3
942 △ 3 square π = 33.33 M