The height of the right circular cone is 35cm and the area of the curved surface is four times the area of its base. What is the volume of the cone (10-3 m3 and correct up to the three decimal place)
Show answer & explanation
Correct answer: C
Explanation
The correct answer is Option 3 i.e. 2.994
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Understanding |
Application |
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CSA = πrl Area of base = πr2 l2 = h2 + r2 |
πrl = 4πr2 l = 4r l2 = h2 + r2 16r2 = 352 – r2 15r2 = 35 × 35 |
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Volume = |
= 2994.444 = 2.994 |
