farhan cycles the first part of 150km journey at an average speed of 35 km/h and walks the remaining distance at an average speed of 5 km/h. if he takes 4,5 hours for his entire journey, find the distance that he cycles

1. farhan cycles the first part of 150km journey at an average speed of 35 km/h and walks the remaining distance at an average speed of 5 km/h. if he takes 4,5 hours for his entire journey, find the distance that he cycles

Time 1 (First part)
= 150km : 35km/h
= 4 2/7 h

Time 2 (Remaining distance)
= 4,5 - 4 2/7
= 4 1/2 - 4 2/7
= 4 7/14 - 4 4/14
= 3/14 h

Distance 1 = 150km

Distance 2
= Speed x Time
= 5 km/h x 3/14 h
= 1.07 km

Total Distance
= 150 + 1.07
= 151.07 km

2. A train travelling at 160km/h takes 5 hours for a journey. How long would it take a train travelling at 200 km/h?

Jawaban:

4 hours

Penjelasan dengan langkah-langkah:

160km/h x 5 hours = 800km

if the distance is 800km

so, 800km : 200km/h = 4 hours

3. Samad travelled a distance of 17 km. He cycles part of the journey at 16 km/h and runs the remaining journey at 6 km/h. His total time taken is 2 hours. Find his cycling distance.​

Jawab:

a) First distance is 17 km

b) First speed is at 16 km/h

c) Second speed is at 6 km/h (remaining journey)

First 1 hour with 16 km/h is:

= 16 km/h x 1

= 16 km

Remain of 1 hour is 6 km/h:

= 6 km/h x 1

= 6 km

Total distance is:

= 17 km + 16 km + 6 km

= 33 km + 6 km

= 39 km

4. Partha moves from Jhunjhunu to Jodhpur by car to reach in 6 hours with anaverage speed of 60 km/hour. What will be average speed while returning, if ittakes 4 hours ?hours ?(A)80 km/hour(B)70 km/hour(C)90 km/hour(D)60 km/hour​

Jawaban:

C.90km/hour

Penjelasan dengan langkah-langkah:

v = s/t → t = s/v → s = t×v

s1 :s2

t1 × v1 = t2 × v2

6 × 60 = 4 × v2

v2 = 360/4

v2 = 90km/hour

5. the earth takes....takes hours or one day to complete a spin​

Jawaban:

24 hours

Penjelasan:

semoga membantu

Jawaban:

24 hours

Penjelasan:

harap membantu

6. 1. Kate travelled for the first 1 ½ hours at an average speed of 64 km/h and the next 2 ½ hours at 72 km/h. Find the average speed for the whole journey!.. ​

[tex] \frac{(1,5 \times 64) + (2,5 \times 72)}{1,5 + 2,5} \\ \\ \frac{96 + 180}{4} = \frac{276}{4} = 69 \frac{km}{h} [/tex]

7. A car departs from Makassar to Mamuju takes 6 hours at a speed of 80 km / hour. The car's mileage is ... km.​

Penjelasan dengan langkah-langkah:

480 Km

Cause, The time takes 6 hour and the speed is 80 Km/Hour

So, 80x6=480 Km

8. At 08.45 hours, a lorry leaves Town A for Town B at an average speed of 52 km/h, it arrives atTown B at 12.30 hours. On the return journey, the lorry leaves Town B at 14.55 hours andarrives at Town A at 18.15 hours. Find the average speed of the lorry on the return journey!​Jawab dlm bahasa Indonesia please

Jawaban:

Pukul 08.45 jam, sebuah truk meninggalkan Kota A untuk Kota B dengan kecepatan rata-rata 52 km / jam, tiba di

Kota B jam 12.30. Pada perjalanan pulang, truk meninggalkan Kota B pada 14,55 jam dan

tiba di Kota A pukul 18.15. Temukan kecepatan rata-rata truk dalam perjalanan pulang!

9. A man took 4 1/2 hours to drive 360 km from Singapura to KualaLumpur. He used 37.5 liter of petrol for the journey. a. Find his average speed. b. Find the petrol consumption rate in km/L c. He drove at an average speed 110 km/h on a highway for 2 hours during his journey. Find his average speed for the remaining part of his journey. Tolong yaaa

A

[tex]average \: speed \: = \frac{s}{t} = \frac{360}{4.5} = 80 \: \frac{km}{h} [/tex]

B

[tex]petrol \: consumption \: = \frac{s}{petrol} = \frac{360}{37.5} = 9.6 \frac{km}{l} [/tex]

C

[tex]remaining \: times = 4.5 - 2 = 2.5 hours \\ remaining \: distance = 360 - (110 \times 2) = 360 - 220 = 140 \: km \\ average \:speed \: for \: remaining \: time = \frac{s}{h} = \frac{140}{2.5} = 56 \frac{km}{h} [/tex]

I hope this is helpful ☺

10. Jacob drove to see his parents on weekends. He took 2 hours to cover 1 5 of the journey. He covered the remaining 800 km in 2 hours. What is the average speed of Jacob for the whole journey?

distance

= ⁵/4 × 800

= 1000 km

total time

= 2 + 2

= 4 hours

average speed

= distance ÷ time

= 1000 ÷ 4

= 250 km/h ✔️

_______________

11. At 08.45 hours, a lorry leaves Town A for Town B at an average speed of 52 km/h. It arrives at Town B at 12.30 hours. On the return journey, the lorry leaves Town B at 14.55 hours and arrives at Town A at 18.15 hours. Find the average speed of the lorry on the return journey!Jwb dong, ini untuk ujian naik kelas secepat nya jwb y

Penjelasan dengan langkah-langkah:

ini yang translate ke inggrisnya agak lucu ya, tapi ngerti si intinya

perjalanan berangkat

t = 12.30 - 08.45 = 3 jam 45 menit = 3,75 jam

v = 52 km/jam

s = 52 km × 3,75 jam = 195 km

perjalanan pulang

t' = 18.15 - 14.55 = 3 jam 20 menit = 3 1/3 jam = 10/3 jam

dit: v perjalanan pulang atau v'

s = v' × t'

195 km = v' × 10/3 jam

v' = 195 km × 3/10 jam = 58,5 km/jam

12. 4 Mr Abu drove for 2 h at a speed of 70 km/h. He then drove another 224 km. He took 5 hours for the whole journey. Find the total distance Mr Abu had driven. What was Mr Abu's average speed for the whole journey? b km/h, h For the first part of the journey, Distance travelled = b Average speed ? km/h, 5 h Total distance travelled = x km 224 km Total distance Total time km/h + km Mr Abu's average speed for the whole journey was km/h.​

Jawaban:

Materi : Perbandingan dan Skala

Bagian A

Laki - Laki : Perempuan

= 100 : 70

= ( 100 ÷ 10 ) : ( 70 ÷ 10 )

= 10 : 7

Bagian B

Perempuan : Kelas

= 70 : ( 100 + 70 )

= 70 : 170

= ( 70 ÷ 10 ) : ( 170 ÷ 10 )

= 7 : 17

Semoga bisa membantu

Answer

by

BLUEBRAXGEOMETRY

Answerby BLUEBRAXGEOMETRY

13. James drove to see his parents on weekends. He took 2 hours to cover 3/7 of the journey. He covered the remaining 900 km in 7 hours. What is the average speed of James for the whole journey?

Jawaban:

128,5 km/hours

Penjelasan dengan langkah-langkah:

v = J/T

= 900/7 = 128,5

14. John drove for 3 hours at a rate of 50 miles per hour and for 2 hours at 60 miles per hour. What was his average speed for the whole journey?

Jawab:

Penjelasan dengan langkah-langkah:

(50x3+60x2)/(3+2)

150+120/5

270/5

54

So his avarage speed for the whole journey was 54 miles/hour

Penjelasan dengan langkah-langkah:

average speed = (3x50)+(2x60) / (3+2)

= 270/5 = 54milesperhour

15. Andrew drove for 3 hours at a speed of 50 km/h and for 2 hours at 60 km/h. a) What was the total distance Andrew b) What was his average speed for the whole journey? traveled?

a. s = 50×3 + 60×2 = 150+120 = 270km

b. s = 270km

t = 3+2 = 5h

v = 270/5 = 54km/h

hope this helpful:))

16. A cyclist completed 45% of his journey after cycling 18 km.11. What was the length of the whole journey?​

[tex] \frac{45}{100} \: = \: \frac{18}{x} [/tex]
[tex]x \: = \: 18 \: \times \: \frac{100}{45} [/tex]
[tex]x \: = \: 2 \: \times \: 20[/tex]
[tex]x \: = \: 40 \: km[/tex]

Penjelasan dengan langkah-langkah:

[tex]45\% = 18km \\ 100\% = ....[/tex]

whole journey

[tex] = \frac{100\%}{45\%} \times 18 \\ = \frac{20}{9} \times 18 \\ = 40km[/tex]

17. A car travels 100km. The journey takes two hours. The highest speed of the car is 80km/ h, and the lowest speed is 40km/ h. What is the average speed for the journey ?

Jawaban:

Penjelasan:

contoh jangan lupa bintangi LANGKAH PERTAMA (I)

Ubahlah satuan waktu menjadi bentuk jam dengan menggunakan cara sebagai berikut :

1 menit = ¹/₆₀ jam  → 12 menit = 12 × ¹/₆₀ jam = 0,2 jam

4 jam 12 menit = 4 jam + 0,2 jam = 4,2 jam

LANGKAH KEDUA (II)

Hitung jarak tempuh (s) mobil tersebut dengan menggunakan rumus sebagai berikut :

V = s/t

keterangan :  v = kecepatan (km/jam)

                     s = jarak yang ditempuh (km)

                     t = waktu tempuh (jam)

Maka cara menghitungnya yaitu :

s = v × t

 = 80 km/jam × 4,2 jam

 = 336 km

∴ Kesimpulan jarak tempuh (s) mobil tersebut adalah 336 km.

b. Diketahui : Kecepatan rata rata (V) = 80 km/jam

                     Jarak tempuh (s) = 336 km

Ditanya : Waktu tempuh (t) ?

Jawab :

LANGKAH PERTAMA (I)

Hitung waktu tempuh (t) mobil tersebut dengan menggunakan rumus sebagai berikut :

V = s/t

keterangan :  v = kecepatan (km/jam)

                     s = jarak yang ditempuh (km)

                     t = waktu tempuh (jam)

Maka cara menghitungnya yaitu :

t = s/v

 = 336 km / 60 km/jam

 = 5,42 jam

LANGKAH KEDUA (II)

Ubah satuan jam menjadi jam, menit, dan detik dengan menggunakan cara sebagai berikut :

1 jam = 60 menit   →  0,42 jam = 0,42 × 60 menit = 25,2 menit

1 menit = 60 detik  → 0,2 menit = 0,2 × 60 detik = 12 detik

Maka :

5,42 jam = 5 jam 25 menit 12 detik.

∴ Kesimpulan waktu tempuh (t) mobil tersebut adalah 5 jam 25 menit 12 detik.

18. On his outward journey, Ali travelled at a speed of s km/h for 2-½ hours. On his return journey, he increased his speed by 4 km/h and saved 15 minutes. Find Ali's average speed for the whole journey.

Jawaban:

3.08

Penjelasan dengan langkah-langkah silahkan lihat pada gambar:

19. Mr. thomas drove from town x to town z. he took 3 hours to travel 3 out of 4 of the journey. he then took 2 hours to travel the remaining journey at an average speed of 55 km/h. what was mr. thomas'average speed for the whole journey?

75.625 km/h ,
maybe... :)

20. 15. On his outward journey, Ali travelled at a speed of s km/h for 2½-½ hours. On his return journey, he increased his speed by 4 km/h and saved 15 minutes. Find Ali's average speed for the whole journey.

Jawab:

3.08

Penjelasan dengan langkah-langkah silahkan lihat pada gambar: