1.

What is the cost of fencing a circular park whose area is 12,474 m2, if the cost of building the fence is Rs. 250 per metre?1). Rs. 99,0002). Rs. 83,9403). Rs. 78,4204). Rs. 95,500

Answer»

The AREA of the circular park = 12,474 m2

∴ π × (RADIUS)2 = 12474

⇒ (Radius)2 = 3969 m

⇒ Radius = 63 m

Now, Perimeter of circular park = 2π × (radius)

∴ Perimeter = 2 × π × 63

⇒ Perimeter = 396 m

Now, COST of fencing = Rs. 250 per metre

∴ Total cost of fencing = 250 × Perimeter = 250 × 396

⇒ Total cost of fencing = Rs. 99,000


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