有無人識計e1條數呀?
2006-12-17 8:51 pm
1.李先生在同一1時間於2間銀行存錢:在銀行A存入$18000,年利率為5.5%;在銀行B則存入$42000,年利率為8.5%。如果在2.5年後,他發現所得單利息的總額是原來存款總額的x%,求x的值。
回答 (3)
2006-12-17 8:59 pm
✔ 最佳答案
在銀行A , 利息 = 18000x(5.5%)x2.5 = 2475 在銀行B, 利息 = 42000x(8.5%)x2.5 =8925
總利息 = 2475+8925
=11400
11400/(18000+42000) = x %
11400/(18000+42000) = x /100
x=19
2006-12-18 12:36 am
Bank A 1 year $18990
$18000 x 5.5% =$990 2 years$20034.45
2.5years$20585.397
Bank B
$42000 x8.5%=$3570 1 year$45570
2 years$49443.45
2.5years$51544.8
51544.8+20585.397-18000-42000/18000+42000 x 100%
=12130/60000 x 100%
=130/60000 x 100%
=20%
2006-12-17 16:40:56 補充：
The answer is a little different for we calculate it in compound interest.(複利息率)
$18000 x 5.5% =$990 2 years$20034.45
2.5years$20585.397
Bank B
$42000 x8.5%=$3570 1 year$45570
2 years$49443.45
2.5years$51544.8
51544.8+20585.397-18000-42000/18000+42000 x 100%
=12130/60000 x 100%
=130/60000 x 100%
=20%
2006-12-17 16:40:56 補充：
The answer is a little different for we calculate it in compound interest.(複利息率)
2006-12-17 8:57 pm
1.
總利息: 18000 * 0.055 * 2.5 + 42000 * 0.085 * 2.5 = 11400
x = [11400 / (18000 + 42000)] * 100%
x = 19%
總利息: 18000 * 0.055 * 2.5 + 42000 * 0.085 * 2.5 = 11400
x = [11400 / (18000 + 42000)] * 100%
x = 19%
收錄日期: 2021-04-13 16:03:08
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20061217000051KK01552