Question:The rates of interest in two banks A and B are inthe ratio `5 : 4. A person wants to deposit his total savings in two in such a way that he received equal fafl yearly interest from both. He should deposit the savings in banks A and B in the ratio : 

A `2 : 5` 
B `4 : 5` 
C `5 : 2` 
D `5 : 4` 

+ Answer
B 

+ Explanation
Let the savings be X and Y and the rates of simple interest be `5x` and `4x` respectively. 

Then,

`x xx 5x xx 1/2 xx 1/100`

`= y xx 4x xx 1/2 xx 1/100`

`or x/y = 4/5`.

`i.e.X : Y = 4 : 5

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Irin Moni

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