Question

17. Find the amount and the compound interest on RS
15000 for 2 years at 8% per annum.
18. Find the amount and the compound interest on Rs
25000 for 3 years at 12% per annum,
compounded annually.

19. Calculate the amount due and the compound
interest on Rs 7500 in 2 years when the rate of
interest on successive years is 8% and 10%
respectively.
20. Calculate the difference between the compound
interest and the simple interest on Rs 12000 at 9%
per annum in 2 years

21. Find the amount and compound interest on Rs
16000 for 2 years at 15%. Interest being payable
annually.

22. Rohan borrowed Rs 40000 at 10% p.a. simple
interest. He immediately invested this money at
10% p.a., the interest compounded half-yearly
Calculate Rohan's gain in 18 months.​

Answer 1

Step-by-step explanation:

17)S.I at 8%p.a for first year=(20000×8)/100=Rs.1600

Amount at the end of 1st year=P1+Rs.1600

P2=Rs.21600

SI for second year,

SI2=SI at 8%p.a. for 2nd year=Rs.(21600×8)/100=Rs.1728

Next step:Find the amount which has to be paid at the end of 2nd year.

Amount at the end of 2nd year=P2+SI2

=Rs.(21600+1728)=Rs.23328

Total interest given:Rs.(1600+1728)

=Rs.3328

SI for 2 years=Rs.(20000×8×2)/100

=Rs.3200

Compound interest =Rs.3328

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