Question

In how much time would the simple interest on a certain sum be 0.125 times the principal at 10% per annum?

Answer 1

Formula for finding T:
SI × 100 ÷P ×R
SUBTITUTING
LET P BE x
Then, SI will be 0.125x
T= 0.125x × 100 ÷ 10 × x = 12.5 yrs