A sum of money invested at compound interest amounts to Rs. 800 in 3 years and to Rs. 840 in 4 years. The rate of interest per annum is

A sum of money invested at compound interest amounts to Rs. 800 in 3

1.	A sum of money invested at compound interest amounts to Rs. 800 in 3 years and to Rs. 840 in 4 years. The rate of interest per annum is
A.	2(1/2)%
B.	4%
C.	5%
D.	6(2/3)%
Answer» D. 6(2/3)%

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A sum of money invested at compound interest amounts to Rs. 800 in 3 years and to Rs. 840 in 4 years. The rate of interest per annum is

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