1) If 35% of a number is 140 , find the number.
2) $36000 is deposited in a bank for 8 months . If the rate is 2% p.a., find
(a) the interest
(b)the amount
3) Thomas bought a necklace at $350 and sold it to Mary for $322 . Find the loss percentage .
4) Samuel deposits $7000 in a bank where simple interest is calculated , If ha will get the amount of $7735 after 7 years , what is the interest rate per year ?
數學文字題
2012-11-11 5:42 am
回答 (3)
2012-11-11 8:04 am
✔ 最佳答案
1) 140÷35%=140÷35/100
=140x100/35
=400
The number is 400.
2) (a) $36000x2%x8/12 -------- "2% p.a., 8/12 means 8 month of a year"
=$36000x2/100x8/12
=$480
The interest is $480.
2) (b) $36000+$480
=$36480
The amount is $36480.
3) ($350-$322)/$350x100%
=$28/$350x100%
The loss percentage is 8%.
4) [($7735-$7000)÷7]/$7000x100% --------- "[=interest of a year]"
=$105/7000x100%
=1.5%
The insterest rate (simple) is 1.5% p.a.
2012-11-11 6:16 am
1) 140 / 35%
=400
2) $36000 x (1 + 2% x 8 )
=$36000 x 116%
=$41760
3) Loss percentage
=$(350 - 322)/$350 x 100%
=8%
4) Interest per year
=$(7735 - 7000)/7 years
=$105/year
=400
2) $36000 x (1 + 2% x 8 )
=$36000 x 116%
=$41760
3) Loss percentage
=$(350 - 322)/$350 x 100%
=8%
4) Interest per year
=$(7735 - 7000)/7 years
=$105/year
參考: myself and my calculator
收錄日期: 2021-04-13 19:06:28
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20121110000051KK00562