A cone mounted on a hemisphere of diameter 7 cm total height of toy is 14.5 cm find its TSA
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Diameter of cone = 7cm
Radius of cone = 3.5cm
height of toy = 14.5cm
so, height of cone = 14.5-3.5
. = 11cm
SLANT HEIGHT = ROOT r^2 +h^2
ROOT 3.5^2 + 11^2
ROOT ( 12.25 + 121)
ROOT ( 133.35 )
SO, slant height is 11.54 (approx)......
T.S.A of toy = C.S.A of cone +C.S A of hemisphere
= pi rl + 2pi r ^2
= pi r ( l+ 2r)
= 22/7 ×3.5 ( 11.54 + 2 × 35/ 10)
= 11 ( 11.54 + 7 )
= 11( 18.54)
= 203.94 ( approx)
SO , TOTAL SURFACE AREA OF TOY IS 203.94cm^2
HOPE MY ANSWER IS RIGHT ☆☆☆
Radius of cone = 3.5cm
height of toy = 14.5cm
so, height of cone = 14.5-3.5
. = 11cm
SLANT HEIGHT = ROOT r^2 +h^2
ROOT 3.5^2 + 11^2
ROOT ( 12.25 + 121)
ROOT ( 133.35 )
SO, slant height is 11.54 (approx)......
T.S.A of toy = C.S.A of cone +C.S A of hemisphere
= pi rl + 2pi r ^2
= pi r ( l+ 2r)
= 22/7 ×3.5 ( 11.54 + 2 × 35/ 10)
= 11 ( 11.54 + 7 )
= 11( 18.54)
= 203.94 ( approx)
SO , TOTAL SURFACE AREA OF TOY IS 203.94cm^2
HOPE MY ANSWER IS RIGHT ☆☆☆
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