Question

aplicou-se no regime de juros simples 4.000,00 durante 3 meses e 10 dias e obteve se 4.200,00. Qual a taxa de juros semestral?

Answer 1

3m e 10d=100d
6m=180d

i=j*100/C/t

i=4200-4000*100/4000/100*180
i=200*100/4000/100*180
i=20000/4000/100*180
i=5/100*180
i=0,05*180
i=9
Resposta: Taxa de 9%a.s.