Question

The price of an article is decreased by 20% By what percentage its consumption must be increased so that the expending on it increase by 10% Choose the correct answer from the following options
A. `10%`
B. `25%`
C. `33.(1)/(3)%`
D. `37.5%`

Answer 1

(i) Let the initial price and initial commodity consumption be Rs 100 and 100 units
(ii) Let the price of article be Rs 100 x
(iii) New price of the article will be 80 x
(iv) From Steps (ii) and (iii) find the required percentage