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Tugas Awal Praktikum Perencanaan dan Simulasi Tambang 2015
Laboratorium Perencanaan dan Simulasi Tambang UNISBA
Staff Asisten Laboratorium 2015
Soal Analisis Ekonomi Tambang
Jika diketahui grafik diagram waktu di bawah ini :
C = 100 I = $50 I = $60 I = $70 I = $80 L = 20
0 1 2 3 i! = 20"
#unakan anai%i% &'&( )*+(*+&( ,-C rati.( #r.wth
&'& untuk menentukan
a/akah /r.ek dibenarkan
Penyelesaian :
Analisis ROR
50"
C = , # 4-#( i( n 4*-( i( n L 4*-( i( n
100 = 50 10 4-#( 50"( 4*-( 50"( 20 4*-( 50"(
100 = 50 10 41(015 41(609 20 40(1975
100 = 460(25 41(609 3(95
100 = 100(91
70"
C = , # 4-#( i( n 4*-( i( n L 4*-( i( n
100 = 50 10 4-#(70"( 4*-(70"( 20 4*-(70"(
100 = 50 10 40(885 41(2575 20 40(1197
100 = 458(85 41(2575 2(39
100 = 76(392
Inter/.a%i = 50 470 50 ; 100(91 100 100(91 76(392
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= 50 420 ; 40(095
= 50 0(
= 50(" < 20" 4artina aak
P!
= C , # 4-#( i( n 4*-( i( n L 4*-( i( n
= 100 50 10 4-#( 20"( 4*-( 20"( 20 4*-( 20"(
= 100 50 10 41(272 42(5887 20 40(823
= 100 462(72 42(5887 9(66
= 66(066 < 0 4artina aak
P!R
= )*+ C
= 66(066 100
= 0(66066 < 0 4artina aak
"#$ Ratio = *+& 1
= 0(66066 1
= 1(66066
%rowt& ROR
= , # 4-#( i( n 4*-( i( n 4-*(i(n L 4*-( i( n
= 50 10 4-#( 20"( 4*-( 20"( 4-*(20"( 20 4*-( 20"(
= 50 10 41(272 42(5887 42(0736 20 40(823
= 462(72 45(3679 9(66
= 36(39
C = 100 = 36(39
0 1 2 3
C = 4*-(i(n
