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 Volume and Surface Area :-
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 IMPORTANT EXAMPLES
 ::Important Formulas ::Important Examples
 Here Some Basic Formulas/Rules Are given below :- CUBOID 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) sq. units. 3. Diagonal = √l2 X b2 X h2 units, 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, 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. CONE Let radius of base = r and Height = h. Then, 1. Slant height l = √h2 + r2 units, 2. Volume = (1/3 πr2h) cubic units. 3. Curved surface area = (πrl) sq. units. 4. Total surface area = (πrl + πr2) sq. units. SPHERE Let the radius of the sphere be r. Then, 1. Volume = (4/3 πr3h) cubic units. 2. Surface area = = (4πr2) sq. units. HEMISPHERE Let the radius of a hemisphere be r Then, 1. Volume = (2/3 πr3) cubic units. 2. Curved surface area = (2πr2) sq. units. 3. Total surface area = (3πr2) sq. units.     Remember : 1 litre = 1000 cm3. Click Here for Important Examples