Question

The compound interest on a certain sum for 2 years at 10% per annum is Rs. 1155. The simple interest on the same sum for double the time at half the rate percent per annum is ?
A) Rs. 1100
B) Rs. 5500
C) Rs. 1400
D) Rs. 4120

Answer 1

2

Q:

The compound interest on a certain sum for 2 years at 10% per annum is Rs. 1155. The simple interest on the same sum for double the time at half the rate percent per annum is ?

A) Rs. 1100B) Rs. 5500C) Rs. 1400D) Rs. 4120

Answer:   A) Rs. 1100 

Explanation:

Let the sum be Rs.x. Then, 

 

 [x(1+10100)2-x]=1155

 

⇒x[(1110)2-1]=1155

 

=> x =5500

 

sum = Rs. 5500.

 

So, S.I = Rs. (5500×5×4100) = 1100