Question

A sum of money doubles it self in 8 years what is the rate of interest

Answer 1

Heyy mate ❤✌✌❤

Here's your Answer...

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Let the principle be 100.

Then amount will be 200.

Interest= 100

Time = 8 yrs

R=?

I=PRT/100

100=100*R*8/100

100*100/100*8=R

100/8=R

NOW SUM SHOULD BE 4 TIMES MEANS 400

MEANS INTREST ON 100 IS 300.

I=PRT/100

300=100*100/8*T/100

300*8/100=T

24= T

IN 24 YEARS SUM WILL BECOME 4 TIMES OF PRINCIPLE.

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Answer 2

$\huge\red{Hi\: Friend}$

Let principal = P
Rate of interest = R%
T = 8 years
SI = P

AS WE KNOW THE FORMULA

SI = PRT/100
$p = \frac{p \times r \times 8}{100} \\ r = \frac{p \times 100}{p \times 8} \\ r = 12.5\%$
Hence Rate of interest = 12.5%

$<marquee>Hope it helps you$

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