A sum of Rs. 7000 is invested in a bank at simple interest, after 3 years he invested Rs. 3000 more and after 8 years he earned total interest of Rs. 4970. What will be the rate of interest at which he invested the sum?

A sum of Rs. 7000 is invested in a bank at simple interest, after 3 ye

1.	A sum of Rs. 7000 is invested in a bank at simple interest, after 3 years he invested Rs. 3000 more and after 8 years he earned total interest of Rs. 4970. What will be the rate of interest at which he invested the sum?
A.	7%
B.	4.5%
C.	8%
D.	9%
Answer» B. 4.5%

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A sum of Rs. 7000 is invested in a bank at simple interest, after 3 years he invested Rs. 3000 more and after 8 years he earned total interest of Rs. 4970. What will be the rate of interest at which he invested the sum?

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