Question

if a rectangular cross - section with coordinates at (1, 1), (1, 4), (3, 4) and (3, 1) is rotated about the line y = 1, what will be the resulting three - dimensional object? cone cylinder sphere pyramid

Explanation:

When a rectangle is rotated about an axis parallel to one of its sides, the resulting 3 - D object is a cylinder. Here, the rectangular cross - section is rotated about the line y = 1 which is parallel to one of its sides.

Answer:

B. Cylinder