A right circular cone is 84 cm height .the radius of the base is 350 cm.then the curved surface area is
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h= 84cm
r = 350cm
CSA = pi × r × l
l = sq root of ( h^2 + r^2 )
= sq root of ( 84^2 + 350^2)
= sq root of ( 7056 + 122500)
= sq root of ( 129566 )
l = 359.95
CSA = 22/7 × 350 × 359.95
= 2771615/7
CSA = 395945 cm^2
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