# By selling an article for Rs.900; a man gains 20%. Find his cost price and the gain. - Mathematics

Sum

By selling an article for Rs.900; a man gains 20%. Find his cost price and the gain.

#### Solution

S.P. of an article = Rs.900

Gain = 20%

C.P. =100/((100+"Gain"%))xx"S.P."

∴ C.P. =100/((100+20))xx"Rs."900

= Rs.100/120xx900

= Rs.9000/12

Gain = S.P. − C.P.

= Rs.900 − Rs.750

= Rs.150

Concept: To Find C.P., When S.P. and Gain (Or Loss) Percent Are Given
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#### APPEARS IN

Selina Concise Mathematics Class 8 ICSE
Chapter 8 Profit, Loss and Discount
Exercise 8 (B) | Q 3 | Page 93