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Simple Interest

6.  A sum become its double in 10yr. finds the annual rate of simple interest.?
A. 1%B. 5%
C. 10%D. 20%

7.  A simple interest a sum become 3 times in 20 yr. find the time in which the sum will be double at the same rate of interest ?
A. 8 yrB. 10 yr
C. 12 yrD. 14 yr

8.  A certain sum become 3 fold at 4% annual rate intereset. At what rate, it will become 6 fold ?
A. 10%B. 12%
C. 8%D. 9%

9.  At a simple interest a sum amount to Rs 1012 in 2 1/2 yr and becomes Rs 1067.20 in 4 yr .what is the rate of interest?
A. 2.5%B. 3%
C. 6 yrD. 9 yr

10.  A sum was lent out for a certain time. The sum amount to RS 400 at 10% annual interest rate. When the sum was lent out at 4% annual interest rate, it amount to Rs 200. Find the sum ?
A. Rs 200 / 3B. Rs 100
C. Rs 400 / 3D. Rs 500 / 3


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