B Nirmala Shastry Solutions for Exercise 3: EXERCISE 2C

The population of a town increases by $10\%$ every year. If the present population is $60500$, find its population after $2$ years and $2$ years ago.

The value of a machine depreciates every year by $5\%$ per annum. If the present value is $₹411540$, what was its value $3$ year ago?

A washing machine was bought at $₹15,625$ three years ago. If its value depreciates at $16\%$ per annum, calculate its present value.

A washing machine was bought at $₹15,625$ three years ago. If its value depreciates at $16\%$ per annum, calculate its value after one year from now.

The present value of some equipment in a firm is $₹109350$. If the rate of depreciation is $10\%$ per annum, how many years ago was its value  $₹150000$?

A piece of machinery was purchased by a factory. It depreciates at $10\%$ every year. At the end of second year its value is $₹129600$. What was its cost price? 

A scooter is bought for $₹31250$. If its value after $2$ years is $₹24200$, find its rate of depreciation.

The machinery of a factory was valued at $₹18400$ the end of $2018$. If it depreciated at $8\%$ of the value at the beginning of the year, calculate its value at the end of $2017$ and $2019$.