If the rate of interest rises from 6 1/2 to 8% a man's annual income increases by Rs. 4050. Find the capital.

Due to the rise in the rate of interest, annual income increases by Rs . (8 - 6¹/ ₂) = Rs , 1¹/ 2 _{< sub> , when the capital is Rs . 100
Thus, the required capital = (100 x 2 x 4050) / 3 = Rs. 270000} <>