Mathematics: I will see if your question is hard and if im right i get a brainlest on a question that i solve

I will see if your question is hard and if im

KENYONWASHINGTON868

21.02.2020

answer:

what is my age birth date and last name and first name???:)

Step-by-step explanation:

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kaiya789

21.02.2020

answer:

what

Step-by-step explanation:

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IDONTHAVEABRAIN

13.06.2020

$15\pi\ cm^{2}$

Step-by-step explanation:

we know that

The lateral area of the cone is equal to

$LA=\pi rl$

where

r is the radius of the base

l is the slant height

we have

$r=3\ cm$

Applying the Pythagoras Theorem find the slant height

$l^{2}=3^{2} +4^{2}\\ \\l^{2}=25\\ \\l=5\ cm$

substitute in the formula

$LA=\pi (3)(5)=15\pi\ cm^{2}$

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