Question:The difference between the compound interest and the simple interest for `2` years on a sum of money is Rs.`60`. It the simple interest for `2` years be  Rs.`1440`, the rate per cent is : 

A `4 1/6%` 
B `6 1/4%` 
C `8%` 
D `8 1/3%` 

+ Answer
D 

+ Explanation
S.I. for `1` year = Rs.`720`

S.I. on Rs.`720` for `1` year = Rs.`60`

:. Rate`= ((100 xx 60)/(720 xx 1))`

`= 8 1/3 %`

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Irin Moni

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