Question

plz solve this problem

Answer 1

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$<b><i><font face=Copper black size=4 color=red>$
Here is your answer.

P = Rs 800
R = 2 paise/Rs
= 2/100 × 100
= 2% p.half yearly
T = 3 1/2 years
n = 7 as Compounded half yearly

As we know the formula
A = P (1+ R/100)^n
$= 800 \times (1 + \frac{2}{100} ) {}^{7} \\ \\ = 800 \times (1 + \frac{1}{50} ) {}^{7} \\ \\ = 800 \times ( \frac{51}{50} ) {}^{7} \\ \\ = \frac{800 \times 51 \times 51 \times 51 \times 51 \times 51 \times 51 \times 51}{50 \times 50 \times 50 \times 50 \times 50 \times 50 \times 50} \\ \\ = 918.94$
So Amount is Rs 918.94

CI = A - P
= 918.94 - 800
= 118.94

Therefore Compound interest is Rs 118.94


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Answer 2

$\huge\boxed{\texttt{\fcolorbox{Red}{aqua}{Hey Mate!!}}}$
$<b><i><font face=Copper black size=4 color=blue>$
Here is your answer.

P = Rs 800
R = 2p/Rs
= 2/100 ×100
=2%
T = 3 and 1/2 years
so in = 7 (Compounded half yearly)

As we know
A = P(1+ R/100)^n
$= 800(1 + \frac{2}{100} ) {}^{7} \\ \\ = 800( \frac{100 + 2}{100} ) {}^{7} \\ \\ = 800( \frac{102}{100} ) {}^{7} \\ \\ = 800 \times (1.02) {}^{7} \\ \\ = 800 \times 1.02 \times 1.02 \times 1.02 \times 1.02 \times 1.02 \times 1.02 \times 1.02 \\ \\ = 918.95$
Amount = Rs 918.95

CI = A - P
=918.95 - 800
= 118.95

So Compound Interest is Rs 118.95

$\large{\red{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\underline{\underline{\underline{Hope \: it \: helps\: you}}}}}}}}}}}}}}}$

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