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lianna [129]
2 years ago
15

A right cone has a radius of 13 cm and a slant height of 20 cm. Find its surface area.

Mathematics
1 answer:
devlian [24]2 years ago
5 0

Answer:

A=1347.7\ cm^2

Step-by-step explanation:

Given that,

Radius of a cone, r = 13 cm

Slant height of the cone, l = 20 cm

We need to find the surface area of the cone. The formula for the surface area of the cone is given by :

A=\pi rl +\pi r^2

Put all the values,

A=\pi r(l + r)\\\\A=\pi \times 13(20 + 13)\\\\A=1347.7\ cm^2

So, the surface area of the cone is 1347.7\ cm^2.

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