2. In a building there are 24 cylindrical pillars with each having a radius 28 cm and height 4 m. Find the cost of painting the curved surface area of all pillars at the rate of Rs. 8 per meter square.

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To find the cost of painting the curved surface area of all the cylindrical pillars, we'll first calculate the total curved surface area and then multiply it by the cost per square meter. The curved surface area (AcurvedAcurved) of a cylindrical pillar is given by the formula: Acurved=2πrhAcurved=2πrh where: rr...
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To find the cost of painting the curved surface area of all the cylindrical pillars, we'll first calculate the total curved surface area and then multiply it by the cost per square meter. The curved surface area (AcurvedAcurved) of a cylindrical pillar is given by the formula: Acurved=2πrhAcurved=2πrh where: rr is the radius of the cylinder, hh is the height of the cylinder. Given that the radius (rr) is 28 cm and the height (hh) is 4 m (convert to cm: 4 m=400 cm4m=400cm), we can calculate the curved surface area of one pillar: Acurved=2π×28×400Acurved=2π×28×400 Acurved=2×22/7×28×400Acurved=2×22/7×28×400 Now, calculate the total curved surface area for 24 pillars: TotalCurvedSurfaceArea=24×AcurvedTotalCurvedSurfaceArea=24×Acurved Once you have the total curved surface area, multiply it by the cost per square meter to find the total cost: TotalCost=TotalCurvedSurfaceArea×CostpersquaremeterTotalCost=TotalCurvedSurfaceArea×Costpersquaremeter TotalCost=(TotalCurvedSurfaceArea)×8 Rs/m2TotalCost=(TotalCurvedSurfaceArea)×8Rs/m2 Calculate these values to find the cost of painting the curved surface area of all the pillars. read less
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