In what time does a sum of money become four fold at the simple interest ratio of 10% per annum ?

In what time does a sum of money become four fold at the simple intere

1.	In what time does a sum of money become four fold at the simple interest ratio of 10% per annum ?
A.	40 yr
B.	30 yr
C.	15 yr
D.	25 yr
E.	None of the above
Answer» C. 15 yr

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In what time does a sum of money become four fold at the simple interest ratio of 10% per annum ?

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