## Q- As the farmers are becoming more alert of the harmful effects of applying only the chemical fertilizers and insecticides in agricultural lands, the number of farmers using fertilizers and insecticides in village of Rasulpur decreases by 20% in a year in comparison to its previous year. Three years before, the number of such farmers was 3000, let us calculate the number of such farmers in that village now.

Chapter: Compound Interest and Uniform rate of Increase or Decrease

## Q- Weight of Savan babu is 80 kg. in order to reduces his weight, he started regular morning walk. He decided to reduce his weight every year by 10%. Let us write by calculating, his weight after 3 years.

Chapter: Compound Interest and Uniform rate of Increase or Decrease

## Q- As a result publicity on smoking, the number of smoker is decreased by 1 ¼ every year in comparison to its previous year. If the number of smokers at present in a city is 33750, let us write by calculating, the number of smoker in that city 3 years before.

Chapter: Compound Interest and Uniform rate of Increase or Decrease

## Q- Three years before from today a family had planned to reduce the expenditure of electric bill by 5% in comparison to its previous year. 3 years before, that family had to spend ₹ 4000 in a year for electric bill. Let us write by calculating how much amount will be family have to spent to pay the electric bill in the present year.

Chapter: Compound Interest and Uniform rate of Increase or Decrease

## Q- As a result of continuous publicity on harmful reaction in the use of cold drinks filled bottles, the number of users of cold drinks decreased by 25% every year in comparison to us previous year. 3 years before number of users cold drink in a town was 80000. Let us write by calculating, the number of users of cold drink in the present year.

Chapter: Compound Interest and Uniform rate of Increase or Decrease

## Q- At present the sum of the number of students in all M.S.K in a districts 3993. If the number of students increased in a year was 10% of its previous year, let us calculate the sum of the number of students 3 years before in all the M.S.K in the district.

Chapter: Compound Interest and Uniform rate of Increase or Decrease

## Q- The price of a machine of a factory is ₹ 180000. The price of that machine decreases by 10% in each year. Let us calculate its price after 3 years.

Chapter: Compound Interest and Uniform rate of Increase or Decrease

## Q- The height of tree increases at the rate of 20% every year. If the present height of tree is 28.8 meter, let us calculate the height of tree 2 years before.

Chapter: Compound Interest and Uniform rate of Increase or Decrease