A solid toy is in the form of hemisphere surmounted by right circular cone. Height of the cone is 4 cm and diameter of the base is 6 cm. What will be the surface area of the toy?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 726/7 cm2
| Understanding/Application |
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Radius of cone and hemisphere = 3 cm and height = 4 cm slant height = l = √(42 + 32) = √25 = 5 cm |
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Surface area of toy = Curved surface area of cone + Curved surface area of hemisphere = πrl + 2πr2 = πr(l + 2r) = (22/7 × 3 ) × (5 + 6) = 726/7 cm2 |