The height of a right circular cone is 24 cm. If the radius of its base is 7 cm, then what will be the curved surface area of this cone? [Use π = $\frac{22}{7}$]
Answer & explanation
Correct answer: option 1
We know that,
L2 = R2 + P2
The curved surface area of the cone = πrl
We have,
The height of a right circular cone = 24 cm
The radius of base = 7 cm
L2 = 242 + 72
L = 25 cm
Now, The curved surface area of the cone = \(\frac{22}{7}\) × 7 × 25 = 550cm2
The cost of painting the curved surface area of the cone = 550 × 6 = Rs. 3300