Question

compute the compound amount and interest on a principal of Rs. 21,000 at 9% p.a. after 5 years​

Answer 1

Answer:

✡Compound amount=Rs.30450 and Simple interest=Rs.9450☑

Step-by-step explanation:

Given ⤵

• Principal(P) = Rs.21000
• Rate(R) = 9%
• Time(T) = 5years.

To find⤵

• Simple interest (S.I.)
• Compound amount(A)

Solution⤵

⚫Using formula

$✡S. I. = \frac{PTR}{100} \\ ➡S. I. = \frac{21000 \times 9 \times 5}{100} \\ ➡S. I. = \frac{945000}{100} \\ ➡S. I. = 9450$

➡Simple Interest is Rs. 9450.

⚫Using formula Compound amount= Principal+Simple interest.

➡Compound amount= Rs. 21000+9450

➡Compound interest=Rs.30450

✅Hence, Simple interest is Rs. 9450 and Compound interest is Rs. 30450.

Extra points⤵

$✡ A = S. I. + P \\ ✡S. I. = \frac{PTR }{100} \\ ✡ P = \frac{S. I. \times 100}{TR } \\ ✡T = \frac{S. I. \times 100}{ PR } \\ ✡R = \frac{S. I. \times 100}{ PT}$

Where A=Compound amount, S. I. = Simple interest, P= Principal, T=Time and R= Rate of interest.

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