If a sum of money doubles itself in 10 years at simple interest, the ratepercent per annum is	Select: A) 10 B) 12.5 C) 13 D) 13.5 E) 14
Explanation:   Let sum = x then Simple Interest = x   Rate = (100 * x) / (x * 10) = 10   Option 10
<result>A</result>
If a sum of money doubles itself in 10 years at simple interest, the ratepercent per annum is