Question:Prabhat took a certain amount as a loan from a bank at the rate of `8%`p.a.S.I and gave the same amount to Ashish as a loan at the rate of `12%`p.a. If at the end `12` years ,he made a profit of Rs.`320` in the deal, what was the orginal amount ? 

A `Rs. 2000` 
B `Rs. 3000` 
C `Rs. 4000` 
D None of these 

+ Answer
D 

+ Explanation
Let the original amount be Rs.x.Then,

`(x xx 12 xx 12)/100 - (x xx 8 xx 12)/100`

`= 320 ⇔ x`

`= 2000/3`

`= Rs. 666.67`

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Irin Moni

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