Unfold the side wrapping paper of a cylindrical food can to get a square. The bottom radius of the cylindrical can is 5cm, and the height of the cylinder is 5cm______ (expressed in π)

Unfold the side wrapping paper of a cylindrical food can to get a square. The bottom radius of the cylindrical can is 5cm, and the height of the cylinder is 5cm______ (expressed in π)

Because the side of the cylinder is square, so the height of the cylinder = the circumference of the bottom, C = 2 π r = 2 × π × 5 = 10 π cm; answer: the height of the cylinder is 10 π cm. So the answer is: 10 π cm

Unfold the side wrapping paper of a cylindrical food can to get a square. The bottom radius of the cylindrical can is 5cm, and the height of the cylinder is 5cm______ (expressed in π)

Because the side of the cylinder is square, so the height of the cylinder = the circumference of the bottom, C = 2 π r = 2 × π × 5 = 10 π cm; answer: the height of the cylinder is 10 π cm. So the answer is: 10 π cm

A square wood block with an edge length of 2 decimeters can be made into () cylinders with a bottom radius of 5 cm and a height of 2 decimeters
Please write the formula or why you got this number

Because a = 2DM = 20cm, r = 5cm
So d = 10 cm
So the square of (20 / 10) = 4
Because 2 / 2 = 1
Therefore, a square wood block with an edge length of 2 decimeters can be made into (4) cylinders with a bottom radius of 5 cm and a height of 2 decimeters