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22.	The ratio between the sale price and the cost price of an article is 7:5. What is the ratio between the profit and the cost price of that article?
	A.  2 : 5
	B.  2 : 7
	C.  5 : 2
	D.  7 : 2

Solution

Let C.P. = Rs. 5x and S.P. = Rs.7x. Then, Gain = Rs. 2x. ∴ Required ratio = 2x : 5x ‹=›2 : 5

23.	If 5% more is gained by selling an article for Rs. 350 than by selling it for Rs. 340, the cost of the article is
	A.  Rs. 50
	B.  Rs. 160
	C.  Rs. 200
	D.  Rs. 225

Solution

Let C.P. be Rs.x. Then, 5% of x = (350 - 340) = 10 ‹=›x / 20 = 10 ‹=›x = 200.

24.	When a plot is sold Rs. 18,700, the owner loses 15%. At what price must the plot be sold in order to gain 15%?
	A.  Rs. 21,000
	B.  Rs. 22,500
	C.  Rs. 25,300
	D.  Rs. 25,800

Solution

85 : 18700 = 115 : x or x = (18700 x 115 / 85) = 25300. Hence, S.P. = Rs. 25300.