A F.1 math Q(5fun)
2007-12-10 8:04 am
Mr Lee deposits $18000 in Bank A at an interest rate of 5.5% p.a. At the same time,he deposits $42000 in Bank B at an interest rate of 8.5% p.a. If 2.5 years later the total simple interest that he receives from the two banks is x% of his original principal,find the value if x.
回答 (2)
2007-12-10 8:19 am
✔ 最佳答案
Interest from Bank A:18000 x 5.5% x 2.5 = $2475
Interest from Bank B:
42000 x 8.5% x 2.5 = $8925
Total interest = 2475+8925 = 11399
Percentage = 11399 / (18000+42000) = 19.0%
2007-12-10 8:18 am
(18000*5.5%*2.5 + 42000*8.5%*2.5)
---------------------------------------------------- *100% = x
(18000+42000)
x = 19
---------------------------------------------------- *100% = x
(18000+42000)
x = 19
參考: 自己
收錄日期: 2021-04-23 17:31:12
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20071210000051KK00012