Question

Kakak menabung di bank Rp.800.000,00dgn suku bunga tunggal 9% pertahun. saat diambil, tabungan menjadi rp.920.000,00. berapa lama kakak menabung?

Answer 1

Bunga yg didapat = 920.000 - 800.000 = 120.000

120.000 = 800.000 x 9% x b/12
120.000 = 800.000 x 9/100 x b/12
120.000 = 800.000 x 9b/1200
120.000 = 8000 x 9b/12
120.000 x 12 = 72.000b
1.440.000 = 72.000b
1.440.000 : 72.000 = b
20 = b

maka selama 20 bulan

Answer 2

Bunga = 920.000-800.000 = 120.000
Bunga 1 bln = 9/12 = 0,75%/bln
Bunga = 120.000/800.000 x 100 = 15
lama = 15/0,75
= 20 bln
= 1 tahun 8 bln