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aleksandr82 [10.1K]
3 years ago
7

This block of ice needs to be wrapped in a special reflective material to keep it from melting before the ice carving competitio

n begins. How much reflective material is needed to cover the block completely, with any overlaps?
Question 5 options:

3.1 m2

1.144 m2

3.67 m2

6.7 m2
Mathematics
1 answer:
lesantik [10]3 years ago
8 0
The answer is D........
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Two squares are attached to the sides of a quarter circle as shown.
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Area of a square is ; 10 * 10 = 100
We have 2 squares so total is 200.

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But we have quarter of a circle so area will be 314/4 = 78.5

Total area of the shape is 200 + 78.5 = 278.5
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Given that ΔUVW is similar to ΔXYZ, find the length of ZX.
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I got the same question and Im pretty sure its d. 20
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What is the solution set of 7x 2 + 3x = 0? {0, 3/7} {0, -3/7} {0, -4/7}
34kurt
X(7x+3)=0
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or
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(0,0) or (-3/7,0)
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Solve:<br><br> -11 2/3 x (-4 1/5) = ?
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Step-by-step explanation:

-35/2 x (-21/5)

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Un cono ha l'area laterale di 255 pigreco cm^2, l'apotema di 17 cm e pesa 900 pigreco g. Calcola il peso specifico del materiale
valkas [14]

Answer:

The specific weight is 1.5\frac{g}{cm^{3}}

Step-by-step explanation:

The question in English

A cone has a lateral area of 255 pi cm^2, an apothem of 17 cm and weighs 900 pi g. It calculates the specific weight of the material of which it is composed

step 1

Find the radius of the cone

we know that

The lateral area of a cone is equal to

LA=\pi rl

we have

LA=255\pi\ cm^{2}

l=17\ cm

substitute the values

255\pi=\pi r(17)

Simplify

255=r(17)

r=255/(17)=15\ cm

step 2

Find the height of the cone

Applying the Pythagoras Theorem

l^{2} =r^{2} +h^{2}

substitute the values and solve for h

17^{2} =15^{2} +h^{2}

h^{2}=17^{2}-15^{2}

h^{2}=64

h=8\ cm

step 3

Find the volume of the cone

The volume of the cone is equal to

V=\frac{1}{3}\pi r^{2}h

substitute the values

V=\frac{1}{3}\pi (15)^{2}(8)

V=600\pi\ cm^{3}

step 4

Find the specific weight

Divide the mass by the volume

\frac{900\pi }{600\pi}=1.5\frac{g}{cm^{3}}

4 0
3 years ago
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