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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 |
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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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