InterviewSolution
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1). 9.092). 103). 12.54). 20 |
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Answer» Consumption be y kg Expenditure = price × consumption ⇒ Expenditure = x × y Price of SUGAR is increased by 10% New price of sugar = 1.1 x /kg Let new consumption be z kg New Expenditure = (1.1x) × z New Expenditure = old Expenditure ⇒ (1.1x) × z = x × y ⇒ z = y/1.1 Reduction in consumption = (y - z) = y - y/1.1 = y/11 Percentage reduction in consumption=(reduction in consumption/original consumption)× 100 Percentage reduction in consumption = [(y/11)/y] × 100 = 100/11 = 9.09% Shortcut method : If the price of a commodity INCREASES by r%, then the reduction in consumption so as not to increase the expenditure = [r/(100 + r)] × 100% Percentage reduction in consumption = [10/(100 + 10)] × 100 = 1000/110 = 9.09% |
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