Question

The lateral surface area of a right circular cone of height 28cm and base radius 21 cm is

Answer 1

Answer:

lateral surface are = pie × radius × lateral ht = 22 × 28 × 21 ÷ 7 = 1848 cm3

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Answer 2

The lateral surface area of cone is 2310 sq.cm.

Step-by-step explanation:

Lateral surface area of cone = $\pi r \sqrt{h^2+r^2}$

Height of cone = h = 28 cm

Radius of cone = r = 21 cm

Lateral surface area of cone = $\frac{22}{7} \times 21 \times \sqrt{28^2+21^2}=2310 cm^2$

Hence The lateral surface area of cone is 2310 sq.cm.

#Learn more:

The height of a cone is 16cm and its base radius is 12cm. Find the curved surface area and the total surface area of the cone?

https://brainly.in/question/7490761