Question

The compound interest on a certain sum for the first year 4% is 25.the compound interest for 2 yrs at the same rate on the sum will be

Answer 1

Let the sum be Rs. x. Then,

 

 C.I=[x*(50300*100)3−x]=(343x216−x)=127x216C.I=x*50300*1003-x=343x216-x=127x216 

 

⇔127x216=1270⇔127x216=1270 

 

x=2160x=2160 

 

Thus, the sum is Rs. 2160

 

 

Answer 2

Answer:

Let the sum be Rs. x. Then,

 

C.I=[x*(50300*100)3−x]=(343x216−x)=127x216C.I=x*50300*1003-x=343x216-x=127x216  

 

⇔127x216=1270⇔127x216=1270  

 

x=2160x=2160  

 

Thus, the sum is Rs. 2160

Explanation: