Question : The total surface area of a solid hemisphere of diameter 14 cm is (use $\pi=\frac{22}{7}$ ):
Option 1: 522 cm2
Option 2: 462 cm2
Option 3: 428 cm2
Option 4: 584 cm2
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Correct Answer: 462 cm 2
Solution :
Diameter = 14 cm
Radius, $r = \frac{14}{2} = 7$ cm
The total surface area of a hemisphere = $3\pi r^2= 3 \times \frac{22}{7} \times 7^2 = 462$ cm
2
Hence, the correct answer is 462 cm
2
.
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