) In a building there are 100 cylindrical pillars. The radius of each pillar is 7 m and height is 4 m. Find the total cost of painting the curved surface area of all pillars at the rate of Rs 8 per m².
Share
) In a building there are 100 cylindrical pillars. The radius of each pillar is 7 m and height is 4 m. Find the total cost of painting the curved surface area of all pillars at the rate of Rs 8 per m².
Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Answer:
CSA of each pillar= 2πrh
= 2×22/7×7×4
= 176m^2
CSA of 100 pillars= 100×176
=17,600m^2
cost of painting the 100 cylindrical pillar= CSA of 100 cylindrical pillar × 8
= 17600×8
= ₹140,800