The compound interest on a certain sum for 2 | vedclass

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Question

(c) Let the Sum $=₹ 100 x$

For compound interest, $r =10 \%, t =2$ years.

$\begin{aligned} C.I &= P \left[\left(1+\frac{ r }{100}\right)^{ t

Vedclass · Accepted Answer

$500$

Vedclass · Answer

(c) Let the Sum $=₹ 100 x$

For compound interest, $r =10 \%, t =2$ years.

$\begin{aligned} C.I &= P \left[\left(1+\frac{ r }{100}ight)^{ t }-1ight] \ \Rightarrow & 100 x \left[\left(1+\frac{10}{100}ight)^{2}-1ight]=525 \ & \Rightarrow 100 x \left[\left(\frac{11}{10}ight)^{2}-1ight]=525 \ &=21 x =525 \ x &=25 \end{aligned}$

Sum Invested $=₹ 2500$.

For S.I, $r=5 \%, 5=4$ years

$\begin{array}{ll}	ext { S.I } & =\frac{	ext { PNR }}{100} \ & =\frac{2500 	imes 5 	imes 4}{100} \ 	ext { S.I } & =	ext { Rs. } 500\end{array}$

The compound interest on a certain sum for $2$ years at $10 \%$ per annum is ₹ $525 .$ The simple interest (In ₹) on the same sum for double the time at half the rate percent per annum is

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