Question:How much should a person lend at simple rate of interest of `15%`in order to have Rs.`784` at the end of `1 1/2` years ? 

A `Rs. 640` 
B `Rs. 620` 
C `Rs. 610` 
D `Rs. 680` 

+ Answer
A 

+ Explanation
Let the required money be x.Then 

`(x + (x xx 15)/100 xx 3/2)`

`= 784 ⇔ (49x)/40`

`= 784 ⇔ x`

`= (784 xx 40)/49`

`= 640`.

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Irin Moni

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