Question

₹18000 for 2,1/2 years at 10% per annum compounded annually

Answer 1

P=18000

R=10%

T=2yrs

for the first year:-

SI=PRT/100

=18000*2*10/100

=3600

AMT=P+SI

=18000+3600

=21600

Amt of the first year=principal of the second year..

P=21600

R=10%

T=1/2 years

For the second year:-

SI=PRT/100

= 21600*10*1/100*2

= 1800

AMT=P+SI

=21600+1080

=22680

CI=A-P

=22680-18000

= 4680 (ans)

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Answer 2

Answer:

Principal=₹18000

Time=2½yr=1 yr+1 yr+½ yr

Rate=10%

For first year=PRT/100=

18000×10×1/100

=₹1,800

Amount=18000+1800=₹19800

For the next 1 yr principal=₹19800

Interest=19800×10×1/100=₹1980

Amount=₹19800+₹1980=₹21,780

For the next year ½ yr principal=₹21,780

Interest=21780×10×1/100=₹1089

Amount after 2½ yr=₹21780 + ₹1089

=₹22,869

CI=22869

-18000

________

₹ 4869