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4 years ago

How does the volume of a cylinder change when its diameter is tripled

Mathematics

2 answers:

guajiro [1.7K]4 years ago

8 0

Answer:

9πr²h

Step-by-step explanation:

cupoosta [38]4 years ago

5 0

V(cylinder)= πr²h
d=2r,
d is diameter, r is radius.
When diameter is tripled, a new diameter D=3d,
new radius R=3d/2=(3*2r)/2=3r
R=3r

V(new cylinder)= πR²h = π(3r)²h=9πr²h

V(new cylinder)/V(cylinder)=9πr²h/πr²h=9

Volume new cylinder 9 times more the volume of old cylinder.

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Kayra and Mycho sell flowers on weekends to earn extra money.For every 2 flowers that Kayra sells,Mycho sells 5. If Kayra sold 6

andreyandreev [35.5K]

Answer:

We know that:

For every two flowers that Kayra sells, Mycho sells 5.

Now, in the question we have:

"If Kayra sold 6 newspapers, how many did Mycho sell?"

There is no information about newspapers, so we can't answer anything.

If we had something like:

"If Kayra sold 6 flowers, how many did Mycho sell?"

Well, in this case, we remember that for every 2 flowers that Kayra sells, Mycho sells 5, then the first thing we need to do is count how many groups of 2 flowers we have in 6 flowers, this is:

6/2 = 3 groups.

And for each one of these, Mycho will sell 5 flowers, then the total number of flowers that Mycho sold is:

3*5 = 15 flowers.

5 0

3 years ago

The value of a particular stock is increasing at a rate of 7% every month.

viva [34]

Answer:

$600.29.

Step-by-step explanation:

At the end of each month the value is multiplied by 107% = 1.07.

So after 6 months the value is 400(1.07)^6

= $600.29.

5 0

3 years ago

Layla spent 25 minutes on

yKpoI14uk [10]

Answer:

Step-by-step explanation:

25+30= time Layla spent. 3x time layla spent = elijah's time

4 0

3 years ago

Read 2 more answers

In a large population, 53 percent of the people have been vacinated. If 4 people are randomly selected, what is the probability

MArishka [77]

Answer:

4/57

Step-by-step explanation:

Prob=DC/SS

=4/53+4

=4/57

3 0

3 years ago

Find the perimeter of the shaded region. Round your answer to the nearest hundredth.

nataly862011 [7]

Answer:

59.16 units

Step-by-step explanation:

Given that,

The length of rectangle, L = 13

The breadth of the rectangle, B = 6

The perimeter of the shaded region = perimeter of rectangle - 2(perimeter of semicircle)

$P=13\times 6-[2\times \dfrac{2\pi r}{2}]\\\\=78-2\pi r\\\\=78-2\times 3.14\times 3\\\\=59.16$

So, the perimeter of the shaded region is 59.16 units.

4 0

3 years ago