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Marrrta [24]
3 years ago
12

How do i find the actual perimeter and area? 1cm:320m. L= 13.5 W= 3.3 Please explain it. I cannot understand it from the example

s in my book
Mathematics
2 answers:
ratelena [41]3 years ago
8 0
To find the actual area or perimeter, you need to make the centimeters into meters. But, you have to use the scale. ( 1cm : 320m )
L=13.5
You need to multiply 13.5 and 320 (because that's how much more there is in the other model or the meter's shape)
13.5 * 320 = 4,320.
The actual Length in meters is 4,320.
Do the same with W.
3.3 * 320 = 1,056.

<span>Now you have the real lengths.
</span><span>Area = L * W
</span>So you put in the real measurements.
Area = 4,320 * 1,056 
Area = 4,561,920.
Perimeter is the sum of all sides, so Sum up all of the sides' measurements.
Hope this helps <3

mr Goodwill [35]3 years ago
8 0
Okay, so you're given a ratio, which states that every 1cm on the book is actually 320m in real life. 320m is also just 32000cm (320 * 100)

So if the length is 13.5cm, that means you can multiply 13.5 by 32000 to get it's actual length in real life. This is 432000cm (or 4320m).

Same thing with the width. 3.3cm multiplied by 32000 will give you the width in real life, which is 105600cm (or 1056m).

I'm assuming the shape is a rectangle, so the perimeter would be 4320 + 4320 + 1056 + 1056 (because there are four sides, and two of them are the length, and two are width). So the perimeter is going to be 10752m.

The area (if it's a rectangle) will be L * W, which is just 4320 * 1056, which is Okay, so you're given a ratio, which states that every 1cm on the book is actually 320m in real life. 320m is also just 32000cm (320 * 100)

So if the length is 13.5cm, that means you can multiply 13.5 by 32000 to get it's actual length in real life. This is 432000cm (or 4320m).

Same thing with the width. 3.3cm multiplied by 32000 will give you the width in real life, which is 105600cm (or 1056m).

I'm assuming the shape is a rectangle, so the perimeter would be 4320 + 4320 + 1056 + 1056 (because there are four sides, and two of them are the length, and two are width). So the perimeter is going to be 10752m.

The area (if it's a rectangle) will be L * W, which is just 4320 * 1056, which is 4561920 m².

So that's the answer, 10752m for the perimeter and 4561920 m² for the area :)


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Raju’s mother is four times as old as Raju. After 5 years , her mother will be three
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Answer:

Mother: 40 years old

Rakhi: 15 years old

Step-by-step explanation:

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Let present age of Rakhi = x years

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392,196 divided by 87 (Using long division)
ruslelena [56]

Answer:

Step 1:

Start by setting it up with the divisor 87 on the left side and the dividend 392 on the right side like this:

8 7 ⟌ 3 9 2

Step 2:

The divisor (87) goes into the first digit of the dividend (3), 0 time(s). Therefore, put 0 on top:

0

8 7 ⟌ 3 9 2

Step 3:

Multiply the divisor by the result in the previous step (87 x 0 = 0) and write that answer below the dividend.

0

8 7 ⟌ 3 9 2

0

Step 4:

Subtract the result in the previous step from the first digit of the dividend (3 - 0 = 3) and write the answer below.

0

8 7 ⟌ 3 9 2

- 0

3

Step 5:

Move down the 2nd digit of the dividend (9) like this:

0

8 7 ⟌ 3 9 2

- 0

3 9

Step 6:

The divisor (87) goes into the bottom number (39), 0 time(s). Therefore, put 0 on top:

0 0

8 7 ⟌ 3 9 2

- 0

3 9

Step 7:

Multiply the divisor by the result in the previous step (87 x 0 = 0) and write that answer at the bottom:

0 0

8 7 ⟌ 3 9 2

- 0

3 9

0

Step 8:

Subtract the result in the previous step from the number written above it. (39 - 0 = 39) and write the answer at the bottom.

0 0

8 7 ⟌ 3 9 2

- 0

3 9

- 0

3 9

Step 9:

Move down the last digit of the dividend (2) like this:

0 0

8 7 ⟌ 3 9 2

- 0

3 9

- 0

3 9 2

Step 10:

The divisor (87) goes into the bottom number (392), 4 time(s). Therefore put 4 on top:

0 0 4

8 7 ⟌ 3 9 2

- 0

3 9

- 0

3 9 2

Step 11:

Multiply the divisor by the result in the previous step (87 x 4 = 348) and write the answer at the bottom:

0 0 4

8 7 ⟌ 3 9 2

- 0

3 9

- 0

3 9 2

3 4 8

Step 12:

Subtract the result in the previous step from the number written above it. (392 - 348 = 44) and write the answer at the bottom.

0 0 4

8 7 ⟌ 3 9 2

- 0

3 9

- 0

3 9 2

- 3 4 8

4 4

You are done, because there are no more digits to move down from the dividend.

The answer is the top number and the remainder is the bottom number.

Therefore, the answer to 392 divided by 87 calculated using Long Division is:

4

44 Remainder

Step-by-step explanation:

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