If any circular cylinder is surmounted by cone and hemisphere one by one then how you can find the total surface area of resulting solid.
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Given,
Radius, r of cone =5 cm
Height, h of cone =12 cm
slant height, l= √h²+r²
l= √12²+5²
l= √144+25
l= √169
l=√13 cm
Surface area of the toy = Curve surface area of cone + curved surface area of hemisphere
= πrl+2πr²
= πr(l+2r)
= 3.14×5(13+2×5)
= 361.1cm²
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