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A camping tent in hemispherical shape of radius $1.4$ m, has a door opening of area $0.50$ m$^2$. Outer surface area of the tent is
- (a)$11.78$ m$^2$
- (b)$12.32$ m$^2$
- (c)$11.82$ m$^2$
- (d)$12.86$ m$^2$
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Sol. (C) $11.82$ m$^2$