Along the path 100 conical pillars are constructed each pillar has base radius 7 cm and height 24 cm find the total cost of painting these pillars at the rate of rupees 120 per cm²
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Answer:
Rs 1900.80
Step-by-step explanation:
Find the surface area of one pillar:
Area = 2πrh
Area = 2π(0.14)(0.18) = 0.1584 m²
Find the surface area of 100 pillars:
1 pillar = 0.1584 m²
100 pillar = 100 x 0.1584 = 15.84 m²
Find the cost:
1 m² = Rs 120
15.84 m² = 15.84 x 120 = Rs 1900.80
Answer: Rs 1900.80
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