The difference between the simple interest received from two different sources on ₹2500 for 2 years is ₹12.50. The difference between their rates of interest is :

0.25%

S.I. = \(\frac{P × R × T }{100}\)

⇒ S.I.₂ - S.I.₁ = 12.50, (principal is same)

⇒ \(\frac{P × R_2 × 2 }{100} - \frac{P × R_1 × 2 }{100}\)= 12.50

⇒ \(\frac{2500}{100}\) × 2 (R₂ - R₁) = 12.50

⇒ (R₂ - R₁) = \(\frac{12.50× 100 }{2500 × 2}\)

⇒ (R₂ - R₁) = 0.25