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2 years ago

33 1/3 of 21 (finding the percent of a number)

Mathematics

1 answer:

iragen [17]2 years ago

5 0

<span>33% of 21=6.93 i think this is the answer</span>

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1 Point

I am Lyosha [343]

Option C

The ratio for the volumes of two similar cylinders is 8 : 27

<h3><u>Solution:</u></h3>

Let there are two cylinder of heights "h" and "H"

Also radius to be "r" and "R"

$\text { Volume of a cylinder }=\pi r^{2} h$

Where π = 3.14 , r is the radius and h is the height

Now the ratio of their heights and radii is 2:3 .i.e

$\frac{\mathrm{r}}{R}=\frac{\mathrm{h}}{H}=\frac{2}{3}$

<em><u>Ratio for the volumes of two cylinders</u></em>

$\frac{\text {Volume of cylinder } 1}{\text {Volume of cylinder } 2}=\frac{\pi r^{2} h}{\pi R^{2} H}$

Cancelling the common terms, we get

$\frac{\text {Volume of cylinder } 1}{\text {Volume of cylinder } 2}=\left(\frac{\mathrm{r}}{R}\right)^{2} \times\left(\frac{\mathrm{h}}{\mathrm{H}}\right)$

Substituting we get,

$\frac{\text {Volume of cylinder } 1}{\text {Volume of cylinder } 2}=\left(\frac{2}{3}\right)^{2} \times\left(\frac{2}{3}\right)$

$\frac{\text {Volume of cylinder } 1}{\text {Volume of cylinder } 2}=\frac{2 \times 2 \times 2}{3 \times 3 \times 3}$

$\frac{\text {Volume of cylinder } 1}{\text {Volume of cylinder } 2}=\frac{8}{27}$

Hence, the ratio of volume of two cylinders is 8 : 27

7 0

2 years ago

What si the Gcf of 28 42 and 56

vitfil [10]

Answer:

GCF=2

Step-by-step explanation:

28-1,2,4,5,14

42-1,2,3,6,7

56-1,2,7,8,28

4 0

3 years ago

Help!!! I don’t get this

Goshia [24]

i think u gotta multiply

3 0

2 years ago

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One lap around a dirt track is 1/3 mile. It takes Bryce 1/9 hour to ride one lap. What is Bryce's unit rate, in miles, around th

ikadub [295]

3 miles per hour, or 1 mile per every 1/3 hour

7 0

2 years ago

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Can someone help me?

Alika [10]

Answer:

I think it might be 6

Step-by-step explanation:

You should probably wait for another answer, I did this in Math last year so I think it's 6 but I can't really remember sorry ):

4 0

2 years ago

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