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प्रश्न
Find the radius of a circular field if its area is 1386 cm2.
बेरीज
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उत्तर
Given: Area of the circle = 1386 cm2. Use A = πr² (Take π = `22/7`).
Step-wise calculation:
1. A = πr2
= 1386
2. `22/7 r^2 = 1386`
3. `r^2 = (1386 xx 7)/22`
= 63 × 7
= 441
4. r = `sqrt(441)`
= 21 cm
Radius = 21 cm.
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