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3 years ago

In the surface area formula for cylinders, which expression represents lateral area

1 answer:

6 0

The total surface are of cylinder comprises of the lateral or curved surface area + the area of the flat surface on the top and bottom

The lateral surface area is calculated this way

curved area of the face × height

Here it is a circle and hence its circumference is 2πr

Hence the formula become

2πr × h = 2πrh

So 2πrh is the part that represents the curved area of the cylinder

(Additional info: The area of the faces is given by πr² for one side, since a cylinder has 2 faces

we have πr²+πr²=2πr²

Hence the total surface area is 2πrh +2πr²)

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Dade County Public Schools

deff fn [24]

Thirty-four thousandths

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3 years ago

What Is The Surface Area Of this triangular prism? The Base Of Each Triangle 42m And the height of the triangular base is 20m. (

ehidna [41]

Answer:

The surface area is $2,440\ m^{2}$

Step-by-step explanation:

see the attached figure to better understand the problem

we know that

The surface area of a triangular prism is equal to

$SA=2B+PH$

where

B is the area of the triangular base

P is the perimeter of the triangular face

H is the height of the prism

<em>Find the area of the base B</em>

$B=\frac{1}{2}(42)(20)=420\ m^{2}$

<em>Find the perimeter of the base P</em>

$P=(42+29+29)=100\ m$

we have

$H=16\ m$

substitute the values

The surface area is

$SA=2(420)+100(16)=2,440\ m^{2}$

8 0

3 years ago

Write this ratio as a fraction in the simplest form 3 feet to 63 inches

Andrei [34K]

Answer:

4:7

Step-by-step explanation:

Okay, so first convert the feet to inches so 3x12=36. So the it's 36:63. Then if you simplify it you get 4:7.

3 0

3 years ago

How to predict the charge of monatomic ions.

FromTheMoon [43]

Answer:

by gaining or losing electrons

Step-by-step explanation:

hope it helped

brainliest pls

6 0

2 years ago

Julia is allowed to watch no more than 5 hours of television a week. So far this week, she has watched 1.5 hours. Write and solv

Leona [35]

The inequality is used to solve how many hours of television Julia can still watch this week is $x + 1.5 \leq 5$

The remaining hours of TV Julia can watch this week can be expressed is 3.5 hours

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

Given that Julia is allowed to watch no more than 5 hours of television a week

So far this week, she has watched 1.5 hours

To find: number of hours Julia can still watch this week

<em>Let "x" be the number of hours Julia can still watch television this week</em>

"no more than 5" means less than or equal to 5 ( ≤ 5 )

Juila has already watched 1.5 hours. So we can add 1.5 hours and number of hours Julia can still watch television this week which is less than or equal to 5 hours

number of hours Julia can still watch television this week + already watched ≤ Total hours Juila can watch

$x + 1.5 \leq5$

Thus the above inequality is used to solve how many hours of television Julia can still watch this week.

Solving the inequality,

$x + 1.5 \leq5\\\\x \leq 5 - 1.5\\\\x \leq 3.5$

Thus Julia still can watch Television for 3.5 hours

5 0

2 years ago