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katrin2010 [14]
3 years ago
7

the length of a rectangular sing is 4 time its width. if the sign perimeter is 20 inches. what is the sign area ?

Mathematics
1 answer:
Hitman42 [59]3 years ago
8 0

Answer:

Area = 16 in²

Step-by-step explanation:

Represent the length with L and the width with W

We have the following given parameters:

L = 4W

Perimeter = 20

Required

Determine the area.

The perimeter is calculated as thus:

Perimeter = 2(L + W)

Substitute 4W for L and 20 for Perimeter.

20 = 2(4W + W)

20 = 2 * 5W

20 = 10W

Solve for W

W = 20/10

W = 2

Recall that:

L = 4W

L = 4 * 2

L = 8

The area is then calculated as thus:

Area = L * W

Area = 8 * 2

Area = 16

Hence, the area is 16in²

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If the dimensions of the following cylinder are doubled, what will be the surface area of the new cylinder? 1,406.72 in. 2 2,813
ryzh [129]

Based on the calculations, the surface area (SA) of a cylinder is equal to: B.  2,813.44 in.²

<h3>How to calculate surface area of a cylinder?</h3>

Mathematically, the surface area (SA) of a cylinder can be calculated by using this formula:

SA = 2πrh + 2πr²

<u>Where:</u>

  • h is the height.
  • r is the radius.

The dimensions of this new cylinder would be equal to:

Radius = 8 × 2 = 16 in.

Height = 6 × 2 = 12 in.

Substituting the given parameters into the formula, we have;

SA = (2 × 3.14 × 16 × 12) + 2 × 3.14 × 16²

SA = 1,205.76 + 1,607.68

SA = 2,813.44‬ square inches.

Read more on surface area here: brainly.com/question/26396269

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<u>Complete Question:</u>

If the dimensions of the following cylinder are doubled, what will be the surface area of the new cylinder? Radius: 8 in and Height: 6 in.

Group of answer choices.

A. 1,406.72 in.²

B.  2,813.44 in.²

C. 1,607.68 in.²

D. 5,626.88 in.²

7 0
2 years ago
If grandma lives in Palm Springs which is 100 miles away. How long does it take to get there if you drive a constant speed of 50
alexira [117]

Answer:

Step-by-step explanation:

i dont know unit rate 50 miles every hour

50/1

it take 2 hours to get to palmm springs

8 0
3 years ago
I have a 3 foot board that needs to be equally decided into 1/2 how many extra peices will I have
anygoal [31]

Answer:

No extra pieces.

Step-by-step explanation:

Given:

Total number of foot board = 3

Equally divided into =  1/2

Question asked:

How many extra pieces will I have = ?

Solution:

By dividing 3 by 1/2 we can find the extra pieces.

                                                                 = 3\div\frac{1}{2}

                                                                 = 3\times\frac{2}{1}

                                                                 = 6

Since, the remainder is zero, thus there is no any extra pieces I have.

7 0
3 years ago
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Answer:

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6 0
3 years ago
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