A circular board radius 3 m. Painting costs ₹50/m². If 15% is unpainted, what is total cost?

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Accepted Answer

1. Area of the circle: $A=\pi r^2=\pi	imes3^2=9\pi\ 	ext{m}^2$.
2. Painted area = 85% of total: $0.85	imes9\pi=7.65\pi\ 	ext{m}^2$.
3. Cost = $50	imes7.65\pi=382.5\pi$. Using $\pi\approx3.14$ gives $382.5	imes3.14=1201.05\approx1202$.
4. Total cost = **₹1202**.

FINAL_ANSWER: b

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