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Bond [772]
3 years ago
9

Please answer this question ONLY ANSWER IF YOU KNOW FOR SURE

Mathematics
2 answers:
Fittoniya [83]3 years ago
7 0
The answer is 540 m2 hope this helps
Mademuasel [1]3 years ago
4 0
When I see these things, I never know whether we're supposed to
include the bottom or not.

Here's what you have to know in order to solve this:

Area of a triangle = (1/2) (base) (height) .

That's it ! The rest is all just arithmetic.

-- It's a little hard to tell from the drawing, but I think
this thing has six sides.
Each side is a triangle, with base = 15m and height = 12m.
Area of each side = (1/2) (15m) (12m) = (1/2) (180m²) = 90 m²
Area of 6 uvum = (6 x 90 m²) = 540 m² . (That's choice-b.)

That takes care of the sides.
If the bottom is supposed to be included, then we notice that
the bottom is a hexagon. That note of "7.5√3 m" looks like
it's the distance from the center of the hexagon to each side.

If you connect that point to each vertex of the hexagon, then
you have 6 triangles down there. Each one has base = 15m
and height = 7.5√3 m .

Area of each section
= (1/2) (15m) (7.5√3 m)
= (1/2) (112.5 √3 m²)
= 56.25 √3 m² .

Area of all 6 uvum = (6) x (56.25 √3 m²) = 337.5 √3 m²
That's roughly 584.6 m² .

If the bottom is supposed to be included in the whole thing,
then the total surface area is

(540 m²) + (584.6 m²) = 1,124.6 m² (That's choice-c.)

I'm pretty sure the bottom is supposed to be included,
and choice-c is the correct answer.
Otherwise, there would have been no reason to bother
giving us that "7.5√3 m" measurement on the bottom.
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