The price of commodity x increase by 40 paisa every year , while the price of commodity y increase by 15 paisa every year . If in 2001, the price of x was RS 4.20 and that of y was RS 6.30 in which year commodity x will cost 40 paisa more than the commodity y .

Q. A shopkeeper gives a discount of

5

paise in one rupee on a commodity whose marked price is

R s .16

. What is sthe percentage of discount given ? Find the selling price.

Q. Price of a commodity decreased by 10% last year and increased by 20% this year. Find the % change in two years.

Q. If the price of any commodity decreases by

20

% and the demand for that commodity increases by

40

%, then the elasticity of demand would be __________.

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The price of a commodity X increases by 40 paise every year, while the price of commodity Y increases by 15 paise every year. If in 2001, the price of commodity X was Rs.4.20 and that of Y was Rs.6.30, in which year commodity X will cost 40 paise more than the commodity Y?

The correct option is B 2011 Suppose commodity X will cost 40 paise more than Y after z years. Then, (4.20 + 0.40z) – ( 6.30 + 0.15z ) = 0.40 ⟹ z = 10 So in 2011, X will cost 40 paise more than Y.

The correct option is B
2011

Suppose commodity X will cost 40 paise more than Y after z years. Then,

(4.20 + 0.40z) – ( 6.30 + 0.15z ) = 0.40

$⟹$ z = 10

So in 2011, X will cost 40 paise more than Y.