a toy is in the form of a cone mounted on a hemisphere radius of base and h of the cone 7 cm 8cm respectively find the surface area
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Step-by-step explanation:
radius of cone =7cm
given the height of cone h =8cm
slant height l=√r²-h²
=√7²-8²
=√49-64
=√25
=5cm
L.S.A. of cone =πrl
=22/7×7×5
=22×5
=110cm²
L.S.A of hemisphere=⅔πr²
=⅔×22/7×7²
=⅔×22/7×49
=⅔×22×7
=308/3
=102.66
L.S.A of toy =L.S.A of cone+L.S.A of hemisphere
=110+102.66
212.66
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