Question

1. distinguish between expansion and contraction?

2. distinguish between increase and decrease?

3. type of paper on the basis of quality and on the basis of size?
4. different type of envelope and different size of envelope in economy ?​

Answer 1

Answer:

Extension in demand:

(i) Other things being constant, when with a fall in price, demand for a commodity rises, it is called extension in demand.

(ii) It is caused due to fall in price of the commodity.

(iii) There is a downward movement along the same demand curve from left to right.

Increase in demand:

(i) When at a given price larger quantity is purchased due to change in factors, other than price of the same commodity, it is called increase in demand.

(ii) It is caused by change in other factors affecting demand price remaining the same.

(iii) Consumers demand curve shifts to the right.

Explanation:

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Answer 2

Answer:

Ans 1. The increase in size of an object on heating is called expansion whereas the decrease in size of an object on cooling is called contraction.

Ans 2. When used as nouns, decrease means an amount by which a quantity is decreased, whereas increase means an amount by which a quantity is increased. When used as verbs, decrease means of a quantity, to become smaller, whereas increase means (of a quantity, etc.) to become larger or greater.

ans 3,4 don't know