In a building there are 36 cylindrical pillars. The radius of each is 21 cm and the height is 4m. Find the total cost of painting the curve surface area of all the pillars at the rate of rupees 12 per meter Sq.
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answer is 2280rs it is done by using the formula 2πrh
CSA of cylinder=2πrh
CSA of 36 pillars=36x2πx0.21x4=190
cost=12x190=2280rs
CSA of cylinder=2πrh
CSA of 36 pillars=36x2πx0.21x4=190
cost=12x190=2280rs
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Meaning of CDA? ?
CSA means curved surface area
Oh..thank you
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