Question

एक निश्चित धनराशि पर साधारण ब्याज एक निश्चित ब्याज की दर से 2 वर्षों में 1200 रुपये है। उसी धनराशि का चक्रवृद्धि ब्याज साधारण ब्याज की दर से 2 वर्षों में 1290 रुपये मिलता है। मूलधन कितना होगा?

Answer 1

Answer:

Simple interest on a fixed amount is 1200 rupees in 2 years at a fixed rate of interest. The compound interest of the same amount is 1290 rs in 2 years at the rate of simple interest.

Step-by-step explanation:

Answer 2

The correct answer would be - 4000 rupees.

Given:

Simple interest of an amount of 2 years = 1200

The omplex interest of the same amount with the same rate in two years = 1290

Solution:

Simple interest of an amount remains constant over the years therefore the one-year simple interest of one year:

simple interest of one year = 1200/2

= 600

Complex interest and simple interest of first-year are same in every situation, the

The complex interest of first-year = 600

Complex interest is the second year calculated on the interest of the first year as well as principal amount

there are 90 rupees extra that is the complex interest of the second year on first-year interest that is,

rate = 90*100/600

= 15%

So the rate of simple interest and complex interest will be 15% then the principal amount

P = 1200*100/15*2

= 4000

thus, the correct answer is - 4000.