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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?

Correct Answer: 9.09%

Let the price of kerosene be x and householdconsumption be y.Expenditure = xyNew cost of kerosene = 1.1x, let new householdconsumption 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%

The price of a pen is 25% more than the price of a book . The Price of a pen holder is 50% more than the price of the book. How much is the price of the pen holder more than the price of the pen?

The price of a pen is 25% more than the price of a book. The price of a pen holder is 50% more than the price of the book. How much is the price of the pen holder more than the price of the pen?

The price of a pen is 25% more than the price of a book. The price of a fan holder is 50% more than the price of the book. How much is the price of the pen holder more than the price of the pen?

After the increase of price of oil by 40%, a family decided to reduce its oil consumption so that the expenditure for oil goes up by 26% only. If the total consumption of oil before the price rise was 10 kg per month, then what is the current consumption of oil per month (in kg)?

Directions : In each of the following questions a statement is given, followed by three conclusions. Give answer :

Statement : In order to reduce the gap between income and expenditure, the company has decided to increase the price of its product from next month.

Assumptions :
I. The rate will remain more or less same after the increase.
II. The expenditure will more or less remain the same in near future.
III. The rival companies will also increase the price of the similar product.

The price of a certain item is increased by 15%. If consumer wants to keeps his expenditure on the item same as before, how much percent must he reduce his consumption of that item ?

If the price of onion is decreased by 60%, find by how much percent a man must increase his consumption of onion so that the expenditure on onion remains same?

At a certain bookstore , the regular price of each book is 20 percent less than its list price. If during a sale the price of each book at the store was 15 percent less than its regular price, then the price of a book during the sale was what percent less than its list price ?

In new government policy, the price of onion is raised by 35%. By what % should a person reduce onion consumption so that the expenditure on it does not increase?

Every month a man consumes 25 kg rice and 9 kg wheat. The price of rice is 20% of the price of wheat and thus he spends total Rs. 350 on the rice and wheat per month. If the price of wheat is increased by 20% then what is the percentage reduction of rice consumption for the same expenditure of Rs. 350? Given that the price of rice and consumption of wheat is constant :