Question

An amount of money appreciates to Rs. 7.000 after 4 years and to Rs. 10,000 after 8 years at a
certain compound interest compounded annually. The initial amount of money was?


(Please tell me the short trick and longer method also)​

Answer 1

Answer:

Step-by-step explanation:

Let principal = Rs. P

Principle: Amount:amount

P:7000:7000

These all in an interval of 4 years

A2/A1=10,000/7000=107

Note: Amount will increase in multiple.

∴P×10/7=7000

P = Rs.4900

∴Hence