Question

the internal and external diameters of hollow hemisphere are 42cm and 45.5cm respectively. find its capacity and its outer surface area. ​

Answer 1

Answer:

so the answer is here

Capacity = 0.019404 m^3 or 19404 cm^3

& Outer Surface Area = 3250.2925 cm^2

Step-by-step explanation:

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Answer 2

Answer:

3253.25 cm²

Step-by-step explanation:

Inner diameter = 42 cm

inner radius ,r = 21 cm

outer diameter = 45.5 cm

outer radius ,R = 22.75 cm

Capacity = Volume

= 2 / 3 π (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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