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# maths_class_9th_notes

Mohit Kalra
18 Aug 0 0

FORMULAE

Cylinder

Curved surface area of cylinder  =  2Πrh

Total surface area of cylinder  =  2Πr(h + r)

Volume of cylinder  =  Πr2h

Cone

Curved surface area of cone  =  Πrl

Total surface area of cone  =  2Πr(l + r)

Volume of cone  =  Πr2h / 3

Sphere

Surface area of sphere  =  4Πr2

Volume of sphere  =  4Πr3 / 3

Cube

Surface area of cube  =  4a2

Total surface area of cube  =  6a2

Volume of hemisphere  =  a3

Cuboid

Surface area of cuboid  =  2(hw + lh)

Total surface area of cuboid  =  2(lw + hw + lh)

Volume of cuboid  =  l x w x h

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