40) A cone is surmounted on a hemisphere. The slant height of the cone
is 7cm and its radius is 5cm, then total surface area of the solid is.
A) 400cm2 B) 440cm2 C) 380cm2 D) 350cm2 ( dont type unessary messages)
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Given : A cone is surmounted on a hemisphere. The slant height of the cone is 7cm and its radius is 5cm,
To Find : total surface area of the solid
Solution:
cone is surmounted on a hemisphere.
TSA = CSA hemisphere + CSA cone
CSA hemisphere = 2πR² = 2π ( 5)² = 50π cm²
CSA cone = πRL = π(5)(7) = 35π cm²
total surface area of the solid = 50π + 35π = 85π cm²
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