The simple interest on a sum for 8 years is Rs . 47500 .The rate of interest for the first 5 years is 10 % per annum and for the next 3 years is 15% per annum .What is the value (in Rs.) of sum ?
A sum of Rs .8000 is divided into two parts .The simple interest on first part at the rate of 21% per annum is equal to the simple interest on second part at the rate of 35% per annum .What is the interest (in Rs .) of each part ?