Form 3 Maths(Interest)

2010-01-06 2:03 am

Ivan invests a sum of money at 6%p.a. simple interest for 3 years.Victor deposits the same amount of money for the same period of time at an interest rate of 5%, but the interest is compounded yearly.The compounded interest received by Victor is $22375 less than the simple interest received by IvanWhat is the simple interest received by Ivan?

I have done it for many times but I cannot work it out.
Thanks!

回答 (1)

MagicHand

2010-01-06 2:39 am

✔ 最佳答案

Form 3 d數甘難既=.=
我都計好多次先計到 .. 不過原來我用錯式囧

你用英文教既 . 我用返英文答啦~
我計法係首先搵左佢地入左幾多錢先

Let y be the amount they deposit
Ivan : y( 6/100) x3 = 18y/100 <-Ivan 3年後收到既錢
Victor : y( 1+ 5%)^3 - y = 0.157625y <- Victor 3年後收到既錢

Ivan Victor
18y/100 - 0.157625y = 22375
18y - 15.7625y = 2237500 <- 左邊成條式x100 右邊x100
2.2375y = 2237500
y = 1000000 <- 佢地入左1000000

知左佢地入左幾多錢就計到啦^___^

1000000 x 6% x 3years = 180000

&there4;The simple interest received by Ivan is $180000

應該岩掛 >< 做左好耐如果岩既希望選我做最佳

2010-01-05 18:39:59 補充：
&lt 同埋 &there4;
亂碼左吾洗理 >

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