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in how many years will a sum of money become 8 times it self at 7 % per annum simple interest(in years)?

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100 years

If x is principal and 8x is final amount with interest, then
interest = 7x =x*7*t/100
so t=100 yrs
11 years agoHelpfull: Yes(1) No(1)

100 yrs
Assume P= 100, then SI = 700, R = 7 %, T=?
T= SI X 100 / P X R
= 700 X 100 / 100 X 7 = 100 YRS Ans.
11 years agoHelpfull: Yes(0) No(0)

Bank Exam Other Question

A sum doubles itself in 6 years at simple interest. in how many years will the sum become 8 times of itself at the same rete of interest. the simple interest obtained on investing 600 at the end of 2 years in bank A would be 90 more that that obtained one investing it at the end of the same time in bank B. The annual rate of interest of A is more that that of B by how many percentage points.