Question : The radius of a hemisphere is 6.3 cm. What will be its volume?
Option 1: $572.80\ \text{cm}^3$
Option 2: $643.50\ \text{cm}^3$
Option 3: $523.90\ \text{cm}^3$
Option 4: $353.38\ \text{cm}^3$
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Correct Answer: $523.90\ \text{cm}^3$
Solution :
The volume of a hemisphere with radius $r$
$= \frac{2}{3}\pi r^3$
$=\frac{2}{3}×\frac{22}{7}×6.3×6.3×6.3$
$= 523.90\ \text{cm}^3$
Hence, the correct answer is $523.90\ \text{cm}^3$.
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