Question 342421
Principal amount (P)= $200
Rate (R) = 2% per annum
Time (T) = ?
Simple Interest (I) = $50

{{{ T= I*100/(P*R)}}}
= 12.5 years

(PS: I have assumed the interest given is simple interest. Reply me if the interest given is the compound interest. My email is   akc2@uno.edu)