Question

a toy is in the form of a cone mounted on a hemisphere. The radius of the base and the height of the cone are 7 cm and 8 cm respectively. Find the surface area of the toy​

Answer 1

Gɪᴠᴇɴ :

• Radius = 7 cm
• Height = 8 cm

Tᴏ Fɪɴᴅ :

• Surface area of the toy

Sᴏʟᴜᴛɪᴏɴ :

Slant height of the cone

⇒ l = √r² + h²

⇒ √7² + 8²

⇒ √49 + 64

⇒ √113

Surface area of the toy = CSA of cone + surface area of hemisphere

⇒ πrl + 2πr²

⇒ 22/7 × 7 × √113 + 2 × 22/7 × 7²

⇒ 22√113 + 308 sq.cm

Answer 2

Answer:

387.71cm²

Step-by-step explanation:

Surface area of Cone = πr(r+√h²+r²)

= 22/7 × 7 ( 7+√8²+7²)

= 22 ( 7+√8²+7²)

= 387.71

Hope it helps you...