Question

If the price of kerosene be raised by 11%, find by how much percent a house holder must reduce his consumption of kerosene so as not to increase his expenditure?

A) 11% B) 9.09% C) 11.09% D) 8.25%

Answer 1

Answer:

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Answer 2

Answer:

B) 9.09%

Step-by-step explanation:

Let the price of kerosene be x and household

consumption be y.

Expenditure = xy

New cost of kerosene = 1.1x, let new household

consumption be z.

In order to not to increase expenditure,

xy = 1.1x * a

⇒ a= 10y/ 11

⇒ consumption should decrease by = 1/11 X 100 = 9.09%

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