Question : What is the total surface area of a cone, if the slant height and radius of a cone are 30 cm and 14 cm, respectively?
Option 1: 1980 cm2
Option 2: 1963 cm2
Option 3: 1908 cm2
Option 4: 1936 cm³
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Correct Answer: 1936 cm³
Solution :
The slant height and radius of a cone are 30 cm and 14 cm.
Total surface area of a cone = $\pi r(r+l)$
= $\frac{22}{7}×14(14+30)$
= 44 × 44
= 1936
Hence, the correct answer is 1936 cm
2
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