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ORA building is in the form of a cylinder of radius 7m and height 6m, scone of same radius and of slant heighturmounted by a14m. Calculate the outer surface area of theuilding. |
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Answer» We have r= 7m and h=6mSurface area of building wall= 2πr.h=7*6*22/7= 132 m²As the vertical angle is 60 degree we have slant height= dia l= 2r= 14lateral surface area of cone= πrl=22*7*14/7=308 m²Total surface area = 132+308= 440m²Painting rate is Rs 30/m²Total cost of painting= 440*30= Rs13200 like if you find it useful |
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