After poaching 3 lions in a certain forest of Gujarat , only 15 are left in a year . Determine in the death rate per capita .

A certain sum of money will be doubled in 15 years at the rate of simple interest percent per annum of

The simple interest on a certain sum of for two years is Rs 1000 at the rate 10% per annum. What is the amount after these two years?

If the simple interest on a certain sum of money is 4//25th of the sum and the rate per cent equal to the number of years, then find the rate of interest per annum.

On a certain sum the interest paid after 3 years is Rs.450 at 5% rate of interest per annum. Find the sum.

A sum of money becomes (7)/(6) of itself in 3 years at certain rate of simple interest. The rate per annum is

If the price of a machine depreciaters at the rate of r% per annum, then prince of the mechine is ₹ V after t years. Determine what was the price of the machine begore t years.