crystalline grignard reagent generally exist in .. form
Answers
Explanation:
Given
The radius of hemisphere is 21 cm
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To Find
The total surface area
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Solution
Formula to Find the Total Surface Area of Hemisphere → 3πr²
With the formula, let's substitute 'r' with the given value and use the value of π as 22/7
\sf \implies 3 \times \dfrac{22}{7} \times (21)^{2}⟹3×
7
22
×(21)
2
\sf \implies 3\times \dfrac{22}{7} \times 441⟹3×
7
22
×441
\sf \implies 3\times 22 \times 63⟹3×22×63
\sf \implies 4158⟹4158
∴ The total surface area of a hemisphere of radius 21 cm is 4158 cm²
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Additional Information
Total Surface Area of Cone → πr (r + l)
Curved Surface Area of Cylinder → πrl
Total Surface Area of Cylinder → 2πr (r + h)
Curved Surface Area of Cylinder → 2πrh
Total Surface Area of Hemisphere → 3πr²
Curved Surface Area of Hemisphere → 2πr²
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