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Boundaries of solids are:

(A) surfaces

(B) curves

(C) lines

(D) points

Answers (1)

(A) surfaces

Solution:

Solid: A three-dimensional object having a definite shape, size and volume is called a solid.

Surface: A surface is the outermost layer of a physical object (solid) or we can say that surface is a kind of a plane.

Hence, the surfaces are the boundaries of solids.

Hence option (A) is correct.

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