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Send all Formulas of surfaces areas …

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Send all Formulas of surfaces areas and volumes
  • 2 answers

Krishti Sen 5 years, 2 months ago

TSA of cuboid =2[lb×bh×lh] TSA of cube= 6(side)2 CSA of cuboid=2(l+b)h CSA of cube=4a2 CSA of cylinder=2πrh TSA of cylinder=2πr(r+h) CSA of cone=πrl TSA of cone=πr(r+l) SA of sphere=4πr2 CSA of hemisphere=2πr2 TSA of hemudphere=3πr2 Volume of cuboid=l×b×h Volume cube=(side)3 Volume cylinder=πr2rh Volume of cone =1/3πr2h Volume of hemisphere=2/3πr3 Volume of sphere=4/3πr3

Gaurav Seth 5 years, 2 months ago

•   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

SOLIDS AND THEIR SURFACE AREAS

The bodies occupying space are called solids, such as a cuboid, a cube, a cylinder, a cone, a sphere, etc.

These solids have plane or curved surfaces.

SURFACE AREA OF A CUBOID AND A CUBE

The outer surface of a cuboid is made up of six rectangles. If we take the length of the cuboid as l, breadth as b and the height as h, then

Surface area of a cuboid = 2[lb + bh + hl]

Surface area of a cube = 6a2

Note: I. Sometimes a cuboid does not have bottom and top faces. is called the lateral surface area.

     II. Lateral surface area of a cuboid is 2(l + b)h.

              III. Lateral surface area of a cube is 4a2.

              IV. Surface area of a cuboid or cube means total surface area.

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