Final answer:
To find the time when interest on ₹12000 at 13/2% per annum is ₹200, we can use the formula for simple interest: Interest = Principal x Rate x Time. Substituting the given values and solving for Time, we find that the time is 25/13 years.
Step-by-step explanation:
To find the time when interest on ₹12000 at 13/2% per annum is ₹200, we can use the formula for simple interest:
Interest = Principal x Rate x Time
Substituting the given values:
₹200 = ₹12000 x (13/2)% x Time
Converting the rate to decimal form and solving for Time:
₹200 = ₹12000 x (13/200) x Time
Time = ₹200 / (₹12000 x (13/200))
Simplifying:
Time = 25/13 years
Therefore, the time when the interest is ₹200 is 25/13 years.