Question

A sum of money invested at a certain rate of
simple interest doubles itself in 12 years 6
months. It will treble itself at the same rate
of interest in ?​

Answer 1

Answer:

Answer is 25

PLEASE MARK AS BRAINLIEST

Answer 2

Answer : Let the prinicipal be Rs. x then, S.I. = Rs. x , time = 25/2 yearsRate = (100 x S.I./ P x T) = (100 x x x 2/ x x 25)% = 8%Now, prinicipal = Rs. x , S.I. = Rs. (3x - x) = Rs. 2x , Rate = 8%Time = (100 x S.I./ P X Rate )= Rs. (100 x 2x /x x 8) = years = 25 years.