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The price of an article is increased by 20% .By what percentage must its consumption be reduced so that the expenditure on it reduces by 10% ?A. `20%`B. `30%`C. `25%`D. `15%` |
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Answer» Correct Answer - C (i) Let the initial price and initial consumption be Rs 100 and 100 units respectively (ii) (Comsumption ) (Price of an article ) = Total expenditure (iii) Let consumption be 100 articles and rate be Rs 100 (IV) given rate = Rs 80 and total expending = Rs 900. find the consumption by using the formula which is mentioned in (1) (v) find the percentage decrease in the consumption. |
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