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Sahay Sir > Question Answers > NCERT Class 8 > Maths > Chapter 13 - Direct and Inverse Proportions > 61. (i) Number of students in a hostel and consumption of food. (ii) Area of the walls of a room and the cost of white washing the walls. (iii) The number of people working and the quantity of work. (iv) Simple interest on a given sum and the rate of interest. (v) Compound interest on a given sum and the sum invested.

61. (i) Number of students in a hostel and consumption of food. (ii) Area of the walls of a room and the cost of white washing the walls. (iii) The number of people working and the quantity of work. (iv) Simple interest on a given sum and the rate of interest. (v) Compound interest on a given sum and the sum invested.

4. The number of teeth and the age of a person vary