Question

formulas of surface area and volumn class 9​

Answer 1

Answer:

SURFACE AREA FOR CYLINDER = 2πrh+2πr²

Volume= π r²h

Answer 2

Answer:

Total surface area of a cuboid = 2[lb + bh + lh]

• Total surface area of a cube = 6(side)2

• Lateral surface area of a cuboid = Area of walls of a room = 2(l + b) × h

• Lateral surface area of a cube = 4a2

• Curved surface area of cylinder = 2πrh

• Total surface area of a cylinder = 2πr(r + h)

• Curved surface area of a cone = πrl

• Total surface area of a cone = πr(r + l)

• Surface area of a sphere = 4πr2

• Curved surface area of a hemisphere = 2πr2

• Total surface area of a hemisphere = 3πr2

• Volume of a'cuboid = l × b × h

• Volume of a cube = (side)3

• Volume of a cylinder = πr2rh