The radius of a bicycle wheel is 28 cm. The area of a bicycle wheel is ....cm2.
1. The radius of a bicycle wheel is 28 cm. The area of a bicycle wheel is ....cm2.
Penjelasan dengan langkah-langkah:
r=28
luas = π r²
= 3,14*28²
=2461,76cm²
2. If a wheel with a radius of 10 cm rolls along its circumference five times, it covers the distance of ....
Jawaban:
C= 2 × 10 × 3.14 = 62.8cm²
5 times = 5 × 62.8 = 314cm
maaf klo salah
3. A wheel with a radius of 20 cm makes 60 revolutions per minute. Find the distance traveled by the wheel in 5 minutes. (Take π = 3.14) *
Jawab:
stop cheating for math ws
Penjelasan dengan langkah-langkah:
dont cheat
4. find the volume of a sphere with radius 4m
Penjelasan dengan langkah-langkah:
volume of sphere = 4/3 × phi × r³
4/3 × 3,14 × 4³ = 267,9048 m³
5. the area of a sphere with a radius of 3,5 cm is ..... cm
Area = 4.pi.r^2 = 4.22/7.3,5^2 = 154 cm^2
6. A wheel of radius 14 cm makes 3 complete turns,What is the distance it travels?
42 m
gata bener atau salahh ,smoga membantu
7. A wheel has a radius of 21 cm. If it made 40 revolutions, how far did it travel?
Jawaban:
Radius = 21cm
Lingkar The Tire = 2πr
= 2x22 / 7x21
= 132 cm
Jarak yang harus ditempuh=924m=92400cm
Jadi jumlah putaran =92400/132
=700
Jadi 700 putaran
8. father bought a new car . its wheel has 0.7m of radius. if the wheel rounds 1200x, find the distance of the car (in km)
Answer:
5,280 m
Explanation with steps:
wheel radius (r) = 0.7 m
number of wheel rounds = 1,200
wheel diameter
= 2 x r
= 2 x 0.7 m
= 1.4 m
wheel circumference
= π x diameter
= (22/7) x 1.4 m
= 4.4 m
so the distance traveled by the car is
= circumference x number of wheel rounds
= 4.4 m x 1,200
= 5,280 m
9. This is a map of an amusement park. Fill in the directions.roller coasterFerris wheeltrain ridemagic showcornerQUA ARXwave poolzatboat rideof the Ferris wheel.(a)The magic show corner is(b) The Ferris wheel isof the wave pool.(c)The roller coaster isof the train ride.(d) The magic show corner isof the roller coaster.(e) The wave pool isof the magic show corner.(f) The magic show corner isof the boat ride.
Penjelasan:
1.A
2.A
3.A
1.A
2.A
3.A
4.The
5.A
6.The
7.the
8.the
10. find the volume of a sphere with radius 14mm
v= 4/3×π×r³ = 4/3×22/7×14×14×14 = 11498,6 mm³
11. apa arti the area of a sphere with a radius of 3,5 cm is
area bola dengan radius 3,5 cm adalaharea bola dengan radius 3,5 cm adalah
12. A ferris wheel can accommodate 96 people in 24 minutes . How many people could ride the ferris wheel in and hour?
1 hour = 60 minute
60:24= 2,5
2,5×90 =240
13. The area of a sphere with a radius of 3.5 cm is ... cm2
luas = π x r x r
= 22/7 x 3,5 x 3,5
= 22 x 0,5 x 3,5
= 38,5 cm2
14. a wheel made of 70 revolutions.it has radius 20cm.how far did it travel
Jawaban:
8800 cm
Penjelasan dengan langkah-langkah:
Distance traveled = how many revolution × circumference of a circle
Let's use π = 22/7
= 70 × 2π × 20
= 70 × 2 × 22/7 × 20
= 400 × 22
= 8800 cm
15. A wheel has a radius of 56 cm. How many revolutions must it make to cover a distance of 1760 cm?
Jawaban:
How many revolutions must it make to cover a distance of 1760 cm ? 5
Langkah langkahCircumference = 2 × π × r
Circumference = 2 × 22/7 × 56
Circumference = 2 × 22 × 8
Circumference = 352 cm
How many revolutions must it make to cover a distance of 1760 cm?
= 1.760 : 352
= 5
16. Jawablah pertanyaan berikut ! Berdasarkan informasi diatas diperoleh bahwa diameter Ferris Wheel pertama adalah 75 meter yang terdiri dari 36 kabin dapat menampung 2.160 orang. Akan dibangun Ferris Wheel baru dengan proporsi yang sama dengan Ferris Wheel pertama. Jika Ferris Wheel baru berdiameter 112,5 meter maka banyak kabin dan maksimum penumpang yang dapat ditampung adalah ...................kabin dan ................orang
Diketahui:
Diameter 1 = 75 m.
Kabin 1 = 36 kabin.
Penampung 1 = 2160 orang.
Diameter 2 = 112,5 m.
Ditanya:
Kabin 2 dan Penampung 2?
Jawaban:
54 kabin dan 3240 orang
Penjelasan dengan langkah-langkah:
Rumus yang digunakan:
[tex] \frac{diameter \: 1}{diameter \: 2} = \frac{kabin \: 1}{kabin \: 2} = \frac{penampung \: 1}{penampung \: 2} [/tex]
[tex] \frac{75}{112,5} = \frac{36}{kabin \: 2} = \frac{2160}{penampung \: 2} [/tex]
Carilah kabin 2 nya.
[tex] \frac{75}{112,5} = \frac{36}{kabin \: 2} [/tex]
[tex]75kabin \: 2 = 112,5 \times 36[/tex]
[tex]75kabin \: 2 = 4050[/tex]
[tex]kabin \: 2 = 54 \: kabin[/tex]
Carilah penampung 2 nya.
[tex] \frac{75}{112,5} = \frac{2160}{penampung \: 2} [/tex]
[tex]75penampung \: 2 = 112,5 \times 2160[/tex]
[tex]75penampung \: 2 = 243000[/tex]
[tex]penampung \: 2 = 3240 \: orang[/tex]
Semoga Membantu.
17. A wheel made 50 revolutions, it covered a distance of 55 m. Find the radius of the wheel. (Take = 22/7)
Jawaban:
radius is 0.175 m
Penjelasan dengan langkah-langkah:
we know if wheel made 50 revolution and mileage is 55.
first we have to find around the wheel
[tex]55 \div 50 = 1.1m[/tex]
than we have to find diameter
[tex]\pi \times d = 1.1 \\ \frac{22}{7} \times d = 1.1 \\ 22d = 7.7 \\ d = \frac{7.7}{22} \\ d = 0.35[/tex]
[tex]d = 2r \\ 0.35 = 2r \\ r = 0.175[/tex]
18. the perimeter of a semicircle with radius 20cm is
Jawaban:
keliling setengah lingkaran dengan jari-jari 20 cma adalah...
10 cm, maaf jika salah
asal2 jawab:v
19. A heavy wheel of radius 20 cm is mounted on a horizontal axle. A rope wrapped around its rim is pulled straight downward with a constant force of 50 N. The rope moves a distance of 50 cm in 1.0 s. Given I wlecl = 1 2 MR^ 2 Determine a) the angular acceleration of the wheel b ) the moment of inertia of the wheel , and c) the mass of the wheel
sorry ga ngerti bahasa inggris
20. the area of a sphere with a radius of 3,5 cm is ..... cm
Area = 4.pi.r^2 = 4.22/7.3,5^2 = 154 cm^2
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