Mr. Lalit invested Rs. $5, 000$ at a certain rate of interest, compounded annually for two years. At the end of first year it amounts to Rs. $5, 325$ . The rate of interest is $R$ . Then $2 R =$ (in $%$ )?

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Solution

Given: Principal $=$ Rs. $5, 000$ , Time $= 2$ years, After one year amount $=$ Rs. $5, 325$
We know that Amount $(A) = P + I$
For $1^{s t}$ year: $5, 324 = 5, 000 + \frac{P \times R \times T}{100}$
$5, 325 = \frac{5, 000 \times R \times T}{100}$
$R = \frac{325}{50}$
Rate of interest $= 6.5 %$ .
$∴ 2 R = 13 %$

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Mr. Lalit invested Rs. 5,000 at a certain rate of interest, compounded annually for two years. At the end of first year it amounts to Rs. 5,325. The rate of interest is R. Then 2R= (in %)?

Given: Principal = Rs. 5,000, Time =2 years, After one year amount = Rs. 5,325We know that Amount (A)=P+IFor 1st year: 5,324=5,000+P×R×T1005,325=5,000×R×T100R=32550Rate of interest =6.5%.∴2R=13%

Mr. Lalit invested Rs. $5, 000$ at a certain rate of interest, compounded annually for two years. At the end of first year it amounts to Rs. $5, 325$ . The rate of interest is $R$ . Then $2 R =$ (in $%$ )?