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Verified answer
Misalkan X=mobil sedanY=mobil besar
dari soal kita dapat persamaan
*4x + 20y =352
*x + y=20
Kita lakukan eliminasi x
*4x + 20y =352 |1|
4x+20y = 352
*x + y=20 |4|
4x + 4y=80
________________-
16y= 272
y=272/16
y=17
subtitusi nilai y=17 ke persamaan 2
*x + y= 20
x +17=20
x=20-17
x=3
sehingga,,
17 * 15000 =255.000
3*4000=12.000
________________+
jumlah total= 267.000
Verified answer
Mobil sedan = xmobil besar = y
•
4x + 20y ≤ 352 || : 4
x + 5y ≤ 88 ... (1)
x = 0 ---> y = 17,6 (dibulatkan 17) ---> A(0,17)
y = 0 --> x = 88
B(88,0)
••
x + y ≤ 20 ... (2)
x = 0 --> y = 20 ---> C(0,20)
y = 0 --> x = 20 ---> D(20,0)
•••
titik potong (1) dan (2)
x + 5y = 88
x + y = 20
---------------- (-)
4y = 68
y = 17
x = 20 - y = 3
E(3,17)
Perhatikan titik A B C D dan E
yg memenuhi soal :
A D dan E
•••
Fungsi obyektif
f(x,y) = 4000x + 15000y
selama 1 jam pertama parkiran dianggap penuh (tdk ada kendaraan yg datang dan pergi)
f(0,17) = 4000.0 + 17 × 15000 = 255000
f(20,0) = 4000 . 20 + 15000 . 0 = 80000
f(3,17) = 4000 . 3 + 17 . 15000
f(3,17) = 12000 + 255000 = 267000
Jadi maksimum pendapatan 1 jam pertama = 267000