tolong ya kak no 2-10 pake cara

2). 5 ekor = 18 hari
6 ekor = y hari

5/6 = y/18
6y = 5 × 18
6y = 90
y = 90/6
y = 15 hari.

Jadi, pakan tersebut cukup untuk 15 hari

3). 5 hari = 24 unit
4 hari = x unit

5/4 = x/24
4x = 5 × 24
4x = 120
x = 120/4
x = 30 unit

Jadi, Pak Tino harus membuat kerajinan 30 unit perhari.

4). 45 ekor = 20 hari
50 ekor = x hari

45/50 = x/20
50x = 45 × 20
50x = 900
x = 900/50
x = 18 hari

5). k = 40 km/jam
w = 1,5 jam
j = k × w
j = 40 × 1,5 = 60 km

k = 60 km/jam
w = j : k
w = 60/60 = 1 jam

Tiba di yogyakarta jam 09.15
Berangkat = waktu tiba - waktu
Berangkat = 09.15 - 1.00 = 08.15

Keterangan: j = jarak, k = kecepatan, w = waktu.

6). waktu = 60 menit = 1 jam
jarak = 80 × 1,2 = 96 km
kecepatan = jarak : waktu
kecepatan = 96 km : 1 jam
kecepatan = 96 km/jam

7). 8 orang = 32 hari

8 orang = 30 hari
10 orang = x hari

8/10 = x/30
10x = 8 × 30
10x = 240
x = 240/10
x = 24 hari

8). 84 hari = 7 orang
49 hari = 7 + x orang

84/49 = (7 + x)/7
84/7 = 7 + x
12 = 7 + x
x = 12 - 7
x = 5 orang

9). 72 orang = 132 hari
72 + 24 orang = x hari
96 orang = x hari

72/96 = x/132
96x = 72 × 132
96x = 9504
x = 9504/96
x = 99 hari

10). 15 orang = 18 hari
15 orang = 18 - 6 hari = 12 hari

15 orang = 8 hari
20 orang = x hari
x = 15 × 8/20
x = 6 hari

2. 5/6 = n/18
n = (18 x 5)/6
n = 15

3. 5/4 = n/24
n = (24 x 5)/4
n = 30

4. 45/50 = n/20
9/10 = n/20
n = (20 x 9)/10
n = 180/10
n = 18

5. 40/60 = n/1,5
2/3 = n/1,5
n = (1,5 x 2)/3
n = 1 jam
Berangkat = 09.15 - 1 jam = 08.15

6. 1,2 jam = 12/10 x 60 menit = 72 menit
72/60 = 80/n
6/5 = 80/n
n = (80 x 6)/5
n = 96 km/jam

7. 8/10 = n/30
4/5 = n/30
n = (30 x 4)/5
n = 24

8. 84/49 = n/7
12/7 = n/7
n = (7 x 12)/7
n = 12
Tambahan = 12 - 7 = 5

9. 72/96 = n/132
3/4 = n/132
n = (132 x 3)/4
n = 99

10. 15/20 = n/8
3/4 = n/8
n = (8 x 3)/4
n = 6