Question

Compound interest. Please help

Answer 1

Given

principal = ₹2400

rate = 20%

time= 3yearv

Amount = principal (1+rate /100)^time

Amount = ₹2400(1+20/100)^3

Amount = ₹2400*216/125

Amount = ₹4147.2

Answer 2

Given :

$\diamond \: \rm Principal = Rs\: 2400$

$\diamond \: \rm Time = 3 \: years$

$\diamond \: \rm Rate = 20 \: \%$

To Find :

$\diamond \rm \: Amount \: from \: this \: data$

Solution :

$\star \tt \: Amount = P(1 + \dfrac{r}{100} )^{n}$

Here,

P = Principal

R = Rate

T = Time

Putting Values :

$\hookrightarrow \sf \: 2400(1 + \cancel\dfrac{20}{100} )^{3}$

$\hookrightarrow \sf \: 2400(1 + \dfrac{1}{5} ) ^{3}$

$\hookrightarrow \sf \: 2400( \dfrac{5 + 1}{5} ) ^{3}$

$\hookrightarrow \sf 2400( \dfrac{6}{5} ) ^{3}$

$\hookrightarrow \sf 2400 \times \dfrac{6}{5} \times \dfrac{6}{5} \times \dfrac{6}{5}$

$\hookrightarrow \sf \cancel\dfrac{518400}{125}$

$\hookrightarrow \sf \large \boxed{ \sf \: Rs \: 4147.2}$