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Maru [420]
3 years ago
5

. If the radius is doubled and the height is halved what is the ratio of the new volume to the original volume

Mathematics
1 answer:
photoshop1234 [79]3 years ago
8 0

Answer: Ratio of new volume to original volume is 2:1.

Step-by-step explanation:

Let the radius of cylinder be 'r'

Let the height of cylinder be 'h'

Original volume of cylinder will be

V=\pi r^2h

If radius get doubled,

New radius be '2r'

If height get halved,

New height be will be

\frac{h}{2}

so, Volume of cylinder becomes

Volume=\pi (2r)^2\times \frac{h}{2}=\pi \times 4r^2\times \frac{h}{2}\\\\Volume=2\pi r^2h

Ratio of new volume to the original volume is given by

2\pi r^2h:\pi r^2h\\\\2:1

Hence, Ratio of new volume to original volume is 2:1.

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Jocelyn is 1.75 meters tall. At 1 p.m., she measures the length of a tree's shadow to be
bija089 [108]

The height of the tree = 15.34m

What is height?

Height is a way to measure someone or something from base to top or head to toe. In other words, height tells how tall someone or something is.

Given,

the height of Jocelyn = 1.75m

At 1 pm = 43.85

She is sway from tree = 38.6

therefore, 43.85 - 38.6 = 5.25

Therefore, height

1.75/5.25 = h/43.35

5.25h = 76.73

therefore, height = 15.34

To know more about HEIGHT, visit:

brainly.com/question/6750993

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8 0
1 year ago
What is the weight of an object whose mass is 16.4 kg?
MrRissso [65]
The answer is 161.70 N.

EXPLANATION

To change from mass to weight multiply by gravity (9.8 m/s^2) 

Fw = m * 9.8 m/s^2 
Fw = 16.5 kg * 9.8 m/s^2 = 161.70 N.
4 0
3 years ago
Read 2 more answers
The value of a professor basketball players autograph rose 30% in the las year.It is now worth $286.00. What was it worth a year
sineoko [7]

Answer:

$220 dollars

Step-by-step explanation:

a = p * w (the percentage formula)

subsitute. It rose by 30 % since last year so you're going to put 1.30 (30% -> 0.30 then add 1)

286 = 1.30 * w

solve.

w = 220

3 0
3 years ago
Simplify : 4y^2+12y-40\y^2+2y-8
PSYCHO15rus [73]
2(2y^4 + 7y^3 - 4y^2 -20)
___________________
Y^2


4y^2 - 40/y^2 + 14y - 8

2(-2y^4 - 7y^3 + 4y^2 + 20)
_ _____________________
Y^2
8 0
3 years ago
Which of the following relations is not a function?
goblinko [34]

Answer:

the last one

Step-by-step explanation:

because you have two (-1) and that means it is not a function.

7 0
2 years ago
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