Q. 184.2( 5 Votes )

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Answer :

As cone is mounted upon hemisphere, both radius will be equal.

So, radius of cone (r) = radius of hemisphere(r) = 3.5 cm

Height of toy = height of cone + height of hemisphere

15.5 cm = h + 3.5 cm (Since height of hemisphere is its radius)

h = 12 cm

So, height of cone (h) = 12 cm

Slant height of cone

= 12.5 cm

Total surface area of toy = curved surface area of hemisphere +

curved surface area of cone

Curved surface area of hemisphere

Curved surface area of cone

Total surface area of toy = 77 + 137.5

Conclusion: Therefore, total surface area of toy is

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