VOLUME AND SURFACE AREA -

	I. CUBIOD
	Let length = l, breadth = b and height = h units. Then,
	1. Volume = (l x b x h) cubic units.
	2. Surface area = 2 (lb + bh + lh)

	II. CUBE

	Let each edge of a cube be of length a. Then, 1. Volume = a³ cubic units.

	2. Surface area = 6a² sq. units.

	3. Diagonal = √3 a units.

 III. CYLINDER

	Let radius of base = r and Height (or length) = h Then,

	1. Volume = (Πr²h) cubic units.

	2. Curved surface area = (2Πrh) sq. units.

	3. Total surface area = (2Πrh + 2Πr² sq. units)

	= 2Πr (h + r) sq. units.

IV. CONE

	Let radius of base = r and Height = h. Then,

	1. Slant height, l = √h² + r ² units.

	2. Volume = [1/3 Πr²h] cubic units.

	3. Total surface area = (Πrl + Πr²) sq.units.

V. SPHERE

	Let the radius of the sphere be r. Then,

	1. Volume = [4/3 Πr3] cubic units.

	2. Surface area = (4Πr²) sq. units. 

 VI. HEMISPHERE

	Let the radius of a hemisphere be r. Then,

	1. Volume = [2/3 Πr3] cubic units.

	2. Curved surface area = (3Πr²) sq. units.

	3. Total surface area = (3Πr²) sq. units.

	Remember : 1 litre = 1000 cm³.

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