Asked by fizz

at what rate of simple interest will a sum of money double itself in four year ?
Answered by Steve
think about it. In 4 years you have added 100%

So, that's 25% per year.
Answered by fizz
8.Mary invested RM3000 in two accounts, some at 12% per annum and the rest at 8 percent per annum.Her total interest for one year was RM3200.how much was invested at each rate?
Answered by Steve
.12x + .08(3000-x) = 3200
now just solve for x, the amount at 12%

I can tell you right now that there's a typo in there somewhere.
Answered by Keerthi
How long will it take for a sum of rs 12600 invested at 9 % per annum becomes to 15678
Answered by Anonymous
in5yr Rs/-5000 amounts to Rs/-9000. in what time at the same rate will rs/- 600 amounts to Rs- 900
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