What sum will become rupees 6000 after 2 years at 5% per annum when the interest is compounded annually?

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Complete step-by-step answer:

Let the sum which will amount to Rs 6,600 in 4 years @ 8% per annum be P.

We know that the interest on the amount P for time t years @ r% per annum is given by $I=\dfrac{P\times r\times t}{100}$

Hence, we have

$I=\dfrac{P\times 8\times 4}{100}=\dfrac{8P}{25}$

We know that the amount A is given by $A=I+P$

Hence, we have

$A=\dfrac{8P}{25}+P=\dfrac{33P}{25}$

But given that A = 6600

Hence, we have

$\dfrac{33P}{25}=6600$

Multiplying both sides by 25, we get

$33P=25\times 6600$

Dividing both sides by 33, we get

$P=\dfrac{25\times 6600}{33}=25\times 200=5000$

Hence the sum which will amount to Rs 6,600 @ 8% per annum for 4 years at simple interest is Rs. 5000.

Hence option (B) is correct.

Note:

Verification:

We have P = 5000, r = 8% and t = 4 years

Hence, we have

$I=\dfrac{5000\times 8\times 4}{100}=1600$

Hence, we have A = P+I = 5000+1600 = Rs 6,600

Hence our answer is verified to be correct.

A. Rs. 600

B. Rs. 6600

C. Rs. 6610

D. Rs. 6615

Solution(By Examveda Team)

$$\eqalign{ & {\text{Amount = 6000}}{\left( {1 + \frac{5}{{100}}} \right)^2} \cr & \Rightarrow {\text{Amount = 6000}} \times \frac{{21}}{{20}} \times \frac{{21}}{{20}} \cr & \Rightarrow {\text{Amount = Rs. 6615}} \cr} $$

Sum

At what per cent per annum will Rs.6,000 amount to Rs.6,615 in 2 years when interest is compounded annually?

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Solution

Amount = `"P"( 1 + r/100)^n`

⇒ 6,615 = `6,000( 1 + r/100 )^2`

⇒ `( 1 + r/100 )^2 = [6,615]/[6,000]`

⇒  1 + `r/100 = 21/20`

= r = 5%

At 5% per annum the sum of Rs. 6,000 amounts to Rs. 6,615 in 2 years when the interest is compounded annually.

Concept: Concept of Compound Interest - Inverse Formula

  Is there an error in this question or solution?

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Chapter 3: Compound Interest (Using Formula) - Exercise 3 (A) [Page 44]

Q 9Q 8Q 10

APPEARS IN

Selina Concise Mathematics Class 9 ICSE

Chapter 3 Compound Interest (Using Formula)
Exercise 3 (A) | Q 9 | Page 44

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Solution

The correct option is BRs 1260: Given, principal (P) = Rs 6000, rate (R) = 10% and n = 2 yearsWe know that,A=P(1+R100)n=6000(1+10100)2=6000(1+110)2=6000(1110)2 (adsbygoogle = window.adsbygoogle || []).push({}); =6000× 1110 × 1110= Rs 7260Compound Interest = Amount − Principal= 7260 − 6000= 1260Hence, the compound interest is Rs 1260.

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What is the amount of Rs 6000 at 5% per annum for 2 years if the interest is compounded yearly?

∴ Amount = Rs.6000 × 110.25% = Rs.6615 The UPTET exam was conducted on 23rd January 2022.

What will be the compound interest on a sum of Rs 6000 /

Complete step-by-step answer: 6300 which will be the principal value for second year. So, the amount obtained after the two years is Rs. 6678.

At what annual rate of interest rupees 6000 would become rupees 6615 in 2 years?

At 5% per annum the sum of Rs 6,000 amounts to Rs 6,615 in 2 years when the interest is compounded annually. Was this answer helpful?

What will be the compound interest on a sum of 6000 for 2 years at the rate of 10 per annum?

So the compound interest on rs. 6000 at 10% per annum for 2 years will be rs. 1260 (Ans.)