Question

A sum of money at simple interest amounts to rs. 14160 in 3 year. If the rate of interest is increased by 25%, the same sum amount to rs. 14700 in the same time. The rate of interest is

Answer 1

$P+ \frac{Pr*3}{100} = 14160\\\\P+P *\frac{5r}{400} *3 = 14700\\\\\left[ Rate\ of\ Int. = r + \frac{25}{100} r \right]\\\\P +\frac{5}{4} (14160 - P) =14700\\\\4P + 70800 - 5P = 58800\\\\P = 70800 - 58800 - 12000\\\\ 12000+12000×r×3100 = 14160\\\\120 * 3 * r =14160 -12000 =2160\\\\rate of interest = \frac{2160}{120*3} = 6%$

Answer 2

Answer:

the before given answer is not understandable...