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प्रश्न
Diameter of a circular garden is 9.8 m. Find its area.
योग
उत्तर
Diameter, d = 9.8 m.
Therefore, radius r = 9.8 ÷ 2 = 4.9 m
Area of the circle = πr2
= `22/7` × (49.2)2 m2
= `22/7` × 4.9 × 4.9 m2
= 75.46 m2
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