Question

write down the formulas of surface areas and volumes​

Answer 1

Answer:

Hey mate, here is your answer.

Step-by-step explanation:

Let each edge of a cube be of length a. Then, Volume = a3 cubic units. Surface area = 6a2 sq....

• Slant height, l = h2 + r2 units.
• Volume = r2h cubic units.
• Curved surface area = ( rl) sq. units.
• Total surface area = ( rl + r2) sq. units.

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 + b2 + 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 = 3a units.

CYLINDER

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

1. Volume = (r2h) cubic units.
2. Curved surface area = (2rh) sq. units.
3. Total surface area = 2r(h + r) sq. units.

CONE

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

Slant height, l = h2 + r2 units.

1. Volume = r2h cubic units.
2. Curved surface area = (rl) sq. units.
3. Total surface area = (rl + r2) sq. units.

SPHERE

Let the radius of the sphere be r. Then,

1. Volume = r3 cubic units.
2. Surface area = (4r2) sq. units.

HEMISPHERE

Let the radius of a hemisphere be r. Then,

Volume = r3 cubic units.

1. Curved surface area = (2r2) sq. units.
2. Total surface area = (3r2) sq. units.
3. Note: 1 litre = 1000 cm3.

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