Question

.Find the SI and amount on P=8400 Rs ,t= 4 yrs ,r= 8 % p.a [4]

Answer 1

Given :

⬤ Principal = Rs. 8400

⬤ Time = 4 years

⬤ Rate = 8%

To Find :

⬤ Simple Interest .

⬤ Amount .

Formula Used :

$\sf[\:{Simple\:Interest=\dfrac{P\times{R}\times{T}}{100}}\:]$

Solution :

According to the Formula :

P×R×T/100

8400 × 8 × 4/100

84 × 8 × 4

2688

Therefore , The Simple Interest is Rs. 2688 .

Formula Used :

$\sf[\:{Amount=P\bigg(1+\dfrac{r}{100}\bigg)^{t}\:]}$

Now :

$\dashrightarrow\sf{A=8400\bigg(\dfrac{1}{1}+\dfrac{8}{100}\bigg)^{4}}$

$\dashrightarrow\sf{8400\times{\bigg(\dfrac{100+8}{100}\bigg)}^{4}}$

$\dashrightarrow\sf{8400\times{\bigg(\dfrac{108}{100}}\bigg)^{4}}$

$\dashrightarrow\sf{8400\times{(1.08)}^{4}}$

$\dashrightarrow\sf{8400\times{1.36}}$

$\dashrightarrow\sf{11428.10}$

Therefore , The Amount is Rs. 11428.10 .