math
posted by rahul .
In how many years will RS 150 double itself at 4 persent simple interest?

S.I. = (PRT)/100
Final amount = P + SI
= P + (PRT)/100
= 150 + (150*4*T)/100
To double itself:
300 = 150 + (150*4*T)/100
150 = (150*4*T)/100
100 = 4T
T = 25
Hence, it will take 25 years
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