C.I. (In Rs. ) on Rs. 7500 for 4 years if rate of interest is 10 % p.a. for first 2 year and 20 % p.

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6.Interest

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What is $C.I.$ (In $Rs.$) on $Rs. 7500$ for $4$ years if the rate of interest is $10 \%$ p.a. for the first $2$ year and $20 \%$ $p.a.$ for the next $2$ year?

A

$5273$

B

$5568$

C

$5724$

D

$5325$

Solution

$CI =7500\left[\left(1+\frac{10}{100}\right)^{2} \times\left(1+\frac{20}{100}\right)^{2}-1\right]$

[Here, $R =10 \%$ per annum for first 2 years and $R =20 \%$ per annum for next 2 years

$=7500\left[\left(\frac{11}{10}\right)^{2} \times\left(\frac{12}{10}\right)^{2}-1\right]=5568$

Standard 13

Quantitative Aptitude

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