Question 62
In questions which of the following vary directly and which vary inversely with each other and which are neither of the two? (i) The quantity of rice and its cost. (ii) The height of a tree and the number of years. (iii) Increase in cost and number of shirts that can be purchased, if the budget remains the same. (iv) Area of land and its cost. (v) Sales tax and the amount of the bill.
The cost of the T-shirt was Rs. 120 in January. the same T-shirt now cost Rs. 150. Find the percentage increases in the cost of the T-shirt.