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