Question

find the curved surface area and total surface area of the each of the following right circular cones

Answer 1

I hope u will get the ans

Answer 2

Answer:

The curved surface area of first cone is 44.32 cm². The curved surface area of second cone is 95.87 cm². The total surface area of first cone is 82.81 cm². The total surface area of second cone is 174.41 cm².

Step-by-step explanation:

The curved surface area of cone is

$A_L=\pi r\sqrt{h^2+r^2}$

The curved surface area of first cone is

$A_{L1}=\pi \times 3.5 \sqrt{2^2+(3.5)^2}=44.32$

The curved surface area of first cone is 44.32 cm².

The curved surface area of second cone is

$A_{L2}=\pi \times 5 \sqrt{(3.5)^2+(5)^2}=95.87$

The curved surface area of second cone is 95.87 cm².

The total surface area of cone is

$A=\pi r\sqrt{h^2+r^2}+\pi r^2$

The total surface area of first cone is

$A_{1}=\pi \times 3.5 \sqrt{2^2+(3.5)^2}+\pi (3.5)^2=82.81$

The total surface area of first cone is 82.81 cm².

The total surface area of second cone is

$A_{2}=\pi \times 5 \sqrt{(3.5)^2+(5)^2}+\pi (5)^2=174.41$

The total surface area of second cone is 174.41 cm².