The perimeter of a rectangle is 128cm. its length is 35 cm. The breadth of the rectangle is .....
1. The perimeter of a rectangle is 128cm. its length is 35 cm. The breadth of the rectangle is .....
Jawaban:
29cm
Penjelasan dengan langkah-langkah:
DIKETAHUIA rectangle,P = 128 cm, andl = 35 cm.DITANYAb = ...?CARA[tex]P = 2l + 2b \\ 128 = 2(35) + 2b \\ 128 = 70 + 2b \\ 128 - 70 = 2b \\ 58 = 2b \\ \frac{58}{2} = b \\ 29 = b[/tex]
Semogamembantu!
2. What is the perimeter of this rectangle ?
Jawaban:
32
Penjelasan dengan langkah-langkah:
2(p+l)
= 2(10+6)
= 2(16)
= 32
3. The lenght of a rectangle is 160% of it's breadth. if the breadth of the rectangle is 50cm, find(a) The length of the rectangle(b) The perimeter of the rectangle
Jawaban:
a. 80cm
b. 260cm
cara terlampir
semoga membantu
4. 6 equal size rectangles are put together to form a big rectangle. The perimeter of each small rectangle is 18 cm. Find the perimeter of the big rectangle.
Jawaban:
the answer is 108
Penjelasan dengan langkah-langkah:
18 times 6 equal 108
18×6= 108
maaf kalo salah yah
5. The perimeter of a rectangle is 12 meters. The length is 3 meters more than twice the width. Find the dimensions of the rectangle
Jawaban:
12×(12+3)=12×15=180
Perimeter = 2l+2w12 meter = 2(w+3) + 2w
12 meter = 2w+6+2w
12 meter = 4w+6
12-6 = 4w
6 = 4w
w = 1.5 m
l = w+3
l = 1,5+3
l = 4.5 m
6. The perimeter of the rectangle is 336 cm. Find the length of the rectangle.(a) What fraction of the perimeter of the rectangle is the length of the rectangle?(b) Find the ratio of the length of the rectangle to its breadth to its perimeter.(3)The length of a rectangle is 6 times as longGive your answer in its simplest form.c)
Jawab:
Answers are below, along with the explanation.
Penjelasan dengan langkah-langkah:
Perimeter of a rectangle is 336 cm.
The length of the rectangle is 6 times as long as the breadth. Let b represents the breadth of the rectangle.
The perimeter is 2 x (length + breadth) = 2 x (6b + b) = 14b.
336 cm = 14b, so b is 24 cm.
So, the length of the rectangle is 6 x 24 = 144 cm.
a. The length of the rectangle is 3/7 of the perimeter of the rectangle.
b. The ratio is 144 : 24 : 336 = 6 : 1 : 14
c. ? What is the question for c?
#BACKTOSCHOOL2020
7. 1. The length of a rectangle is (2x+3)cm and other width is (x-1) a) find the perimeter of the rectangle in terms of X ! b) when X=7, find its perimeter !
Penjelasan dengan langkah-langkah:
p = 2x+3
l = x-1
a) perimeter K
K = 2(p+l)
K = 2(2x+3+x-1)
K = 2(3x+2)
K = 6x+4
b) substitute x= 7 to equation K
K = 6(7) +4
K = 42+4
K = 46
8. The area of a rectangle is 96 cm2. If the breadth of the rectangle is 8cm, find its length and perimeter.
Jawaban:
96cm:8cm:12cm
Penjelasan dengan langkah-langkah:
thanksss
9. The perimeter of a rectangle is 86 meters. The width is five less than the length. The width and the length of rectangle are
jawaban:86meters
penjelasan:theperimeterofaretangleis86meters
10. The perimeter of a rectangle is 128 cm. Its length is 35 cm.Find the breadth of the rectangle.35 cm
Answer:
29 cm
Explanation with steps:
Perimeter = length x 2 + width x 2
128 = 35 x 2 + 2 x width
128 = 70+ 2x width
58 = 2 x width
width = 58: 2
width = 29
I hope this helps
11. the surface area for a rectangle is 368 CM while the bottom area of rectangle is 40 cm not only that the perimeter of bottom is 36 cm what is the volume of the rectangle?
p×l×t=368×40×36=529.920
12. 5. The ratio of the length to the breadth in a rectangle is 6 ∶ 5. If the perimeter of the rectangle is 88 cm, find (a) the length and breadth of the rectangle. (b) the area of rectangle
Jawaban:
a. Length = 24 cm while breadth = 20 cm
b. Area = 480 cm²
Penjelasan dengan langkah-langkah:
Let l = length and b = breadth
2(l + b) = 88 cm
l + b = 44 cm
l : b = 6 : 5 hence l = 6/5 b
6/5 b + b = 44 cm
11/5 b = 44 cm
b = 44 cm × 5/11
b = 20 cm
l = 6/5 × 20 cm
l = 24 cm
Area = b × l
Area = 24 cm × 20 cm
Area = 480 cm²
13. Given that the length of a rectangle is three times of the width. If the area of the rectangle is 192 cm2, then a half of the perimeter of its rectangle is…cm
l = 3w
l.w = A
(3w).w = 192
[tex]3{w}^{2} = 192 \\ {w}^{2} = \frac{192}{3} [/tex]
[tex]w = \sqrt{ \frac{192}{3} } = \sqrt{64} = 8[/tex]
l=3(w) = 3(8) = 24
(1/2) p = (1/2) 2(l+w)
= l + w = 24+8 = 32 cm
14. the perimeter of a rectangle is 100 cm. the ratio of the length to the width is 4 : 1. the area of the rectangle is . . . . *
Short Answer:
400 cm²Step by step Explanations:
Misalkan perbandingan memakai x, maka
panjang : lebar = 4x : 1x
Keliling persegi panjang = 2 x (panjang + lebar)
100 cm = 2 x (4x + 1x)
100 cm = 2 x (5x)
100 cm = 10x
x = 100 cm : 10
x = 10 cm
Maka ukuran perbandingan menjadi
panjang : lebar = 40 cm : 10 cm
Luas persegi panjang = panjang x lebar
Luas persegi panjang = 40 cm x 10 cm
Luas persegi panjang = 400 cm²
15. the length of a rectangle is 1 cm less than twice its width. If the perimeter of the rectangle is 28 cm, find the length of the rectangle!
persegi panjang
p=2l-1
K =2 (p+l)
=2 (2l-1 +l)
=4l-2+2l
=6l-2
6l-2=28
6l=28+2
=30
l= 5 cm
p=2l-1
=2(5)-1
=10-1
=9 cm
so length of rectangle is 9 cmuraian lihat foto yah
16. the perimeter of a rectangle is 100 cm. the ratio of the length to the width is 4 : 1. the area of the rectangle is...
Jawaban:
400 cm^2
Penjelasan dengan langkah-langkah:
perimeter = 2 × (length + width)
100 cm = 2 × (4x+x)
100 cm = 8x + 2x
100 cm = 10x
x = 100/10
x = 10
• length = 4x = 4(10) = 40 cm
• width = x = 10 cm
area = length × width
area = 40 cm × 10 cm
area = 400 cm^2
17. 7. The perimeter of a square with length of side 7,5 cm is equal to the perimeter of a rectangle with 3 cm wide. Calculate the area of that rectangle.
Just remamber the formula u'll get the answer
18. What is the ratio of the perimeter of Rectangle A to the perimeter of Rectangle B? express your answer in its simplest form
Jawab: 3 : 4
perimeter A = 3 + 3 +6+ 6 =18cm
perimeter B = 7 +7 + 5 +5 =24cm
ratio a and b = 18 : 24 = 6 : 8 = 3 : 4
so for the simplest form is 3 : 4
and how i got the number 6 : 8 is by dividing by 3
19. The perimeter of a square with length of side 7,5 cm is equal to the perimeter of a rectangle with 3 cm wide. Calculate the area of that rectangle. ?
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20. the ratio of the length of a rectangle to its breadth is 9:4. If perimeter of the rectangle is 104cm,find the area of the rectangle.
rectangle area ( L ) = l x w
ratio = 9 : 4
Perimeter = 104 cm
l=9x
w= 4x
perimeter = 2l+2w
=9x+9x+4x+4x
=26x
26x = 104
x =104/26
= 4
l=9x =9*4 = 36 cm
w=4x=4*4 = 16 cm
Area ( L ) =l x w
= 36 cm x 16 cm
= 576 cm²
thanks
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