The difference between the simple interest received from two different sources on ₹2000 for 3 years is ₹15 . The difference between their rates of interest is :

0.25%

S.I. = \(\frac{P × R × T }{100}\)

⇒ S.I.₂ - S.I.₁ = 15 (principal is same)

⇒ \(\frac{P × R_2 × 3 }{100} - \frac{P × R_1 × 3 }{100}\)= 15

⇒ \(\frac{2000}{100}\) × 3 (R₂ - R₁) = 15

⇒ (R₂ - R₁) = \(\frac{15× 100 }{2000 × 3}\)

⇒ (R₂ - R₁) = 0.25