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Q.

Which of the following has a rough surface?


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a

A sandpaper

b

Petals of a flower

c

Surface of an apple

d

Glass sheet 

answer is A.

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Detailed Solution

Sandpaper has a rough surface.
Rough material is a material which is not smooth to the touch and has an irregular, uneven surface with lumps or ridges. For example sandpaper and jackfruit. The smooth material is smooth to the touch and has an even or level surface free of blemishes, lumps, roughness, or imperfections—for example, the petals of a flower, the surface of an apple, and a glass sheet.
 
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Which of the following has a rough surface?