(b) Cl for 2 yr = ₹ 756 SI for 2 yr = ₹ 720 It means compound interest on the interest of the firstyear = (756 - 720) = ₹ 36 This implies that the rate of interest is 10%. ∴
36
360
x 100 = 10% It means the principal for the first year was ₹ 3600. ∴