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Question 61 In questions which of the following vary directly and which vary inversely with each other and which are neither of the two? (i) Number of students in a hostel and consumption of food. (ii) Area of the walls of a room and the cost of whitewashing 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.

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Question 61

In questions which of the following vary directly and which vary inversely with each other and which are neither of the two?
(i) Number of students in a hostel and consumption of food.
(ii) Area of the walls of a room and the cost of whitewashing 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.


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