Sunday, 22 December 2019

Surface Area and Volume 8th STD

1) Cuboid is made up of six surface. Each surface is a rectangle



Lateral surface area= 2(l + b)h



Total surface area=2(lb + bh + hl)



2) Cube is made up of six surface. Each surface is a square

Lateral (vertical ) surface area = 4l2.

Total surface area= 6l2.

Volume= l3.








3) Cylinder is made of three surfaces. Base surface are circular shape. 







It also has a curved surface.



Area of the base surface = πr2.

Total surface area= 2πr (r+h)

Volume= πr2h.

Curved surface area= 2πrh


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