What solid is generated when a rectangle is rotated about a line.? a)rectangular pyramid b)cylinder c) rectangular prism d) cone

A solid is a three-dimensional figure obtained by rotating a two-dimensional figure around a straight line .

Different two dimensional figure give different three dimensional figure .

A cone is formed by rotating a right triangle about any line,a sphere is formed by rotating a circle .

If we look at the figure formed by rotating a rectangle around a line the three dimensional figure formed is a cylinder.

The answer is option b)cylinder .

step-by-step explanation:

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answer: bearing in mind that a rectangle has a perimeter of length + length + width + width.

step-by-step explanation:

p = perimeter

l = length

x=width

p = 2l + 2x

p = 2(l+x)     < ==== perimeter of the base of the box.