Question

Find the compound interest on Rs.15000 for 3 years, when the interest is compounded annually and the rate of interest being 12% for the first year, 15% for the second year and 18 % for the third year.​

Answer 1

Correct option is

B

Rs. 3,889.20

Simple Interest I=

100

PNR

Here for first year,

P=Rs.15,000

N=1 year

R=6 %

So, Interest at the end of 1st year I=

100

15,000×1×6

=Rs.900

And for second year,

P=Rs.15,000+Rs.900=Rs.15,900

N=1 year

R=8%

I=

100

15,900×1×8

=Rs.1272

And, for third year,

P=Rs.15,900+Rs.1,272=Rs.17,172

N=1 year

R=10%

I=

100

17,172×1×10

=Rs.1,717.2

So, total interest =Rs.900+Rs.1,272+Rs.1,717.2=Rs.3,889.20

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