Question

AT WHAT RATE % PER ANNUM S.I WILL BE A SUM ITSELF IN 8 YEARS​

Answer 1

Let the sum of money that's principal be x.

Time=8 years

Amount after 8 years becomes double=2x

Therefore,

Simple interest=Amount -principal=2x−x=x

Rate per annum =

P×T

S.I×100

=

x×8

x×100

=

8

100

=

2

25

=12.5%

Then,

We get interest of 8years is 12.5%

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Answer 2

Answer:

12.5%

Step-by-step explanation:

Let the principle money be P and interest rate be R

Therefore,

According to the question,

Time = 8

S.I. = P

Therefore,

⇒ P = P × R × T/100

⇒ R = 100/8 = 12.5%