Question

find the principal that will amount to 729.60 at 7% per annum simple interest in 4 year

Answer 1

Answer:

Step-by-step explanation:

Let the principle=Rs. P

Simple interest (given)=Rs.729.60=SI

Rate of interest(R)=7%

Time(T)=4 years

Now,SI=P×R×T/100

=>729.60=P×7×4/100

=>P=729.60×100/7×4

=>P=Rs.260.57

So, principle=Rs.260.57

Answer 2

The principal is 570

Step-by-step explanation:

Let the principal be x

Amount = 729.60

Rate of interest = 7%

Time = 4 years

Simple interest =Amount - Principal =  729.60-x

Formula : $SI = \frac{P \times T \times R}{100}$

$729.60-x = \frac{x \times 4 \times 7}{100}$

$100(729.60-x)=x \times 4 \times 7$

x=570

Hence the principal is 570

#Learn more:

Find the amount to be paid at the end of the 3 years if the principal amount is 1200 at 10% of principal amount

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