2 years ago

I Need help again :)

Mathematics

2 answers:

Nookie1986 [14]2 years ago

6 0

B it’s b I think I did same one

Eva8 [605]2 years ago

3 0

It’s c because
It says 10 times x squared +5 not 10 times x+5 whole squared

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den301095 [7]

Answer:

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Step-by-step explanation:

Step 1:-

Formula:-

The total surface area of cone is

$S.A = \pi r l +B$

$S.A = \pi r l +area of base$

$S.A = \pi r l+ \pi r^2$ ........(1)

Step 2:-

Given slant height $l = 2\sqrt{3} cm$

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substituting these values in equation (1)

$S.A = \pi (2)(2\sqrt{3} ) + \pi (4)$

on simplification, we get

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Final answer :-

$S.A = 4 (\sqrt{3}+1)\pi cm^2$

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