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A cone is on a hemisphere of radius 14 cm height of the cone 7 cm then find T.S.A of cone. urgent plz fast.

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by mohammedzeba

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by mohammedzeba

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given,

height of cone = 7 cm

radius = 14 cm

t.s.a of the resulting figure = l.s.a of cone + l.s.a of hemisphere

l..s.a of cone = πrl

l=√14+7 = 15.6 cm

⇒22/7×14×15.6 = 686.4 cm²

l.s.a of hemisphere = 2πr²

⇒2×22/7×(14)² = 1232 cm²

t.sa.a of cone = 1232+ 686.4 = 1928.4 cm²

= rl+2r²

=r( l+2r)

=22÷7×14(15.65+28) √r²+h² =l

= 22×2(43.65) 14²+7²=l

=44×43.65 l=15.65cm

=1920.70cm²