I building there are 25 cylinderical pillars. THE RADIUS of EACH pillar is 28CM and HEIGHT is 4 METER. Find the TOTAL COST of painting the pillars at RATE 8 RUPEES per METER SQUARE
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radius of each pillar = 28cm = 28/100 m
height = 4 m
Surface area of each pillar(LSA) = 2πrh
= 2 × 22/7 × 28/100 × 4
= 704/100 m^2
= 7.04 m^2
Surface area of 25 pillars = 7.04 × 25 = 176 m^2
Rate off painting = ₹8 per m^2
Total cost = 8 × 176 = ₹1408
height = 4 m
Surface area of each pillar(LSA) = 2πrh
= 2 × 22/7 × 28/100 × 4
= 704/100 m^2
= 7.04 m^2
Surface area of 25 pillars = 7.04 × 25 = 176 m^2
Rate off painting = ₹8 per m^2
Total cost = 8 × 176 = ₹1408
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