What is the total surface area of a cone, if the slant height and radius of a cone is 30 cm and 14 cm, respectively?
Answer & explanation
Correct answer: option 4
We know that,
Total surface area of cone = πr(r + l)
Slant height of cone l = 30 cm
Radius of cone r = 14 cm
= \(\frac{22}{7}\) × 14 × (14 + 30) = 22 × 2 × 44 = 1936 cm2