What sum will amount to $R s . 6600$ in $4$ years at $8 %$ p.a. simple interest?

R s . 6000

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R s . 5000

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R s . 6200

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R s . 6500

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Solution

The correct option is B $R s . 5000$
$p = P r i n c i p a l a m o u n t$
$n = N u m b e r o f y e a r s$
$r = r a t e o f i n t e r e s t$
$T o t a l a m o u n t = p + \frac{p \times n \times r}{100}$
$T o t a l a m o u n t = 6600$
$n = 4 y e a r s$
$r = 8$
We have to find the principal amount
$\Rightarrow 6600 = p + \frac{p \times 4 \times 8}{100}$

$\Rightarrow 6600 = p + \frac{32 p}{100}$

$\Rightarrow 6600 = p + \frac{8 p}{25}$

$\Rightarrow 165000 = 33 p$
$\Rightarrow p = 5000$

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What sum will amount to Rs.6600 in 4 years at 8% p.a. simple interest?

The correct option is B Rs.5000p=Principal amountn=Number of yearsr=rate of interestTotal amount=p+p×n×r100Total amount=6600n=4 yearsr=8We have to find the principal amount⇒6600=p+p×4×8100⇒6600=p+32p100⇒6600=p+8p25⇒165000=33p⇒p=5000

What sum will amount to $R s . 6600$ in $4$ years at $8 %$ p.a. simple interest?