Question:The difference between compound interest and the simple interest earned on a sum of money at the end of `4` years is Rs.`256.40`
To find out the sum, which of the following information given in the statement P and Q is/are necessary ?

p: Amount of simple interest accrued after `4` years 

Q: Rate of interest per annum. 

A Only P is necessary 
B only Q is necessary 
C Either P or Q is necessary 
D Neither P or Q is necessary 
E Both P and Q is necessary 

+ Answer
B 

+ Explanation
To find out the sum we need rate, time and the difference between C.I. and S.I.

So.Q is necessary.

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Irin Moni

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