Question

what principle will amount to rupees 16240 in 4 years at 4% per annum simple interest

Answer 1

amount=p+ptr/100

=p(1+tr/100)

=p(1+16/100)

=p(1+4/25)

=p(29/25)

a=p(29/25)

16240=p(29/25)

p=(16240*25)/29

p=560*25

p=14000

Answer 2

The principal is Rs.14000

Step-by-step explanation:

Time = 4 years

Rate of interest = 4%

Let the principal be x

Amount = Rs.16240

Simple interest = Amount - Principal = 16240-x

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

Si = Simple interest

P =Principal

T = time

R = rate of interest

Substitute the values in the formula :

$16240-x = \frac{x \times 4 \times 4}{100}\\100(16240-x)=16x\\1624000-100x=16x\\1624000=116x\\\frac{1624000}{116}=x\\14000=x$

Hence The principal is Rs.14000

#Learn more:

Find the rate of interest per annum for 2500 gives an interest of rupees 270 in 3 years ​

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