Question

A certain sum amounts to INR 9799 in 3 year and to INR 12464 in 8 years at a certain rate percent per annum, at simple interest what will be the amount (In rupees) of the same sum in 5 years at double the earlier rate, at simple interest?​

Answer 1

Answer:

13530 please put me a brain list

Answer 2

Given:

The final amount in 3 years = INR 9799

The final amount in 8 years = INR 12464

To Find:

The final amount in 5 years at double the earlier rate, at simple interest

Solution:

Since the final amount in 3 years = INR 9799

and the final amount in 8 years = INR 12464

Thus the interest in 5 years = 12464 - 9799 = INR 2665

Now P = 9799, I = 2665 and T = 5

Substituting the above values in the formula for simple interest.

Rate % = I X 100 / P X T

or Rate % = 266500 / 9799 X 5

= 5.44%

Initial principle amount P = (9799 - P) X 100 / 5.44 X 3

= 8426.34

Interest in 5 years at double the rate = 5.44 X 2 X 8426.34 X 5 / 100

= 4575.50

Final amount in 5 years = 8426.34 + 4575.50

= 13000 (approx)

Hence, the final amount after 5 years will be INR 13000