A cylindrical piller has a diameter of 56cm and is of 35m high. There are 16 pillars around the building .find the cost of Rs 5.50per 1m square
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Find the CSA
2 pi r h
2 * 22\7 *0.28 * 35
Whatever u get multiply it by 5.5 and u will get the answer
2 pi r h
2 * 22\7 *0.28 * 35
Whatever u get multiply it by 5.5 and u will get the answer
naresh60:
how you know that to do only curved surface area
Oh sorry u also have to multiply 16
Then u will get the answer
We take out the CSA when we need to cover up the area of the lateral body and not the top and bottom edges
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