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Total surface area of a right circular cone

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Question

Mark (✓) against the correct answer in each of the following:
The surface area of a solid hemisphere is
(a) 2πr²
(b) 3πr²
(c) 4πr²
(d) $\frac{2}{3} {πr}^{3}$

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Solution

(b) 3πr²

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Q. Mark (✓) against the correct answer in each of the following:
The surface area of a solid hemisphere is
(a) 2πr²
(b) 3πr²
(c) 4πr²
(d)

\frac{2}{3} {πr}^{3}

Q. How is the total surface area of a hemisphere , 3πr² ?

Q. Mark (✓) against the correct answer in each of the following:
24.8 = ?
(a)

24 \frac{4}{5}

24 \frac{2}{5}

24 \frac{1}{5}

(d) none of these

Q. Mark (✓) against the correct answer in each of the following:

\frac{16}{1000} = ?

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(b) 0.16
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4 \frac{3}{100} = ?

(a) 4.3
(b) 4.03
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(d) 43.10

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