Discussion Forum



1)

A certain sum of money amounts to Rs. 770 in one year and amounts to Rs. 847 in two years at certain rate of interest. Find the sum.


A) Rs. 770

B) Rs. 600

C) Rs. 500

D) Rs. 400

E) Rs. 650

Answer:

Option A

Explanation:

Interest for $1$ year $=847-770$ $=77$

Rate of interest $=\frac{77}{770}\times 100$ $=10\%$

Sum $=\frac{(100\times SI)}{N\times R}$

$=\frac{(100\times 77)}{1\times 10}$

= Rs. 770