Question

The different between the compount interest and simple interest on certain sum at 15% per annum for 3 years is Rs 383.50. Find the sum.​

Answer 1

Answer:

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Answer 2

Given CI−SI=Rs.283.50

R=15%

n=3 years

Let the sum be Rs.x

We know that : A=P(1+

100

R

)

n

A=2(1+

100

5

)

3

=x(1.15)

3

_________ (1)

Aslo, SI=

100

PRn

=

100

x×15×3

=1.45x _______ (2)

Thus, we have :

x(1.15)

3

−1.45x=283.50 (from (1)&(2))

⇒1.523x−1.45x=283.50

⇒0.070875x=283.50

⇒x=

0.070875

283

=4,000

Thus, the sum is Rs4000

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