उस अर्धगोले का वक्रपृष्ठ निकालें जिसका व्यास $14 cm$ है।
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उस अर्धगोले का वक्रपृष्ठ निकालें जिसका व्यास $14 cm$ है।

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Solution : अर्धगोले की त्रिज्या $=\frac{14 cm }{2}=7 cm$.

अर्धगोले का वक्रपृष्ठ क्षेत्रफल $=2 \pi r^{2}=2 \times \frac{22}{7} \times 7 \times 7 cm ^{2}$

$=44 \times 7 cm ^{2}=308 cm ^{2} \text {. }$

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