2. Find the principal when the SI is:
(i)Rs126 at 3 % p.a. at the end of 5 years
(ii) Rs10.50 at 4 % p.a. at the end of 2 years 4 months
(iii) Rs31.20 at 8 % p.a. for the period 1st January to 8th August, 2002.
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2. Find the principal when the SI is:
(i)Rs126 at 3 % p.a. at the end of 5 years
(ii) Rs10.50 at 4 % p.a. at the end of 2 years 4 months
(iii) Rs31.20 at 8 % p.a. for the period 1st January to 8th August, 2002.
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Answer:
CaseI
P=Rs 1500 r=12% p.a t=1 year
Interest =
100
1500×12×1
=Rs180.
∴A=Rs1680.
CaseII
P=Rs 1680 r=12% p.a t=1 year
Interest =
100
1680×12×1
=Rs201.
∴A=Rs1881.60.
CaseIII
P=Rs 1881.60 r=12% p.a t=1 year
Interest =
100
1881.60×12×1
=Rs225.80.
∴A=Rs2107.40.
CaseIV
P=Rs 2107.40 r=12% p.a t=
12
3
=
4
1
years
Interest =
100
2107.40×12
×
4
1
=Rs 63.22.
∴A=Rs 2170.62.
Compound interest is Rs 670.62
Step-by-step explanation:
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