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. The internal and external diameters of a hollow hemispherical vessel are 42 cm and 45.5 cm, respectivelyFind its capacity and also its outer curved surface area. |
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Answer» Inner diameter = 42 cminner radius ,r= 21 cm outer diameter =45.5 cm outer radius ,R= 22.75 cm Capacity = Volume = 2 / 3π (R³ - r³ ) = 2 / 3× 22 / 7× [ (22.75)³ - (21 )³] = 2/3× 22 / 7× [11774.5469 - 9261] = 2 / 3× 22 / 7×2513.5469 =5266.47922 cm³ Outer C.S.A = 2πR² = 2× 22 / 7×22.75×22.75 =3253.25 cm² |
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