SOLUTION: Respected sir, 1] A man gains 10% by selling an article for a certain price.If he sells it at double the price,the profit made is ? plz help me as soon as possible... thank

Algebra ->  Percentage-and-ratio-word-problems -> SOLUTION: Respected sir, 1] A man gains 10% by selling an article for a certain price.If he sells it at double the price,the profit made is ? plz help me as soon as possible... thank      Log On


   

Question 195058: Respected sir,
1] A man gains 10% by selling an article for a certain price.If he sells it at double the price,the profit made is ?
plz help me as soon as possible...
thank u.
Answer by anantha(86) About Me  (Show Source):
You can put this solution on YOUR website!
sol:
let the cost price of an article be 100 rs
selling price of an article be x rs
gain%=10%
gain% (or) profit%= (profit/c.p)*100
profit=selling price-cost price
= x-100
substitute this value in the above formula
profit%=(x-100)
------- * 100
100
=x-100
according to the problem profit% is 10%
10=x-100
adding 100 on both sides
10+100=x-100+100
x=110
selling price of an article=110
according to the problem double the selling price=2*110=220
profit=selling price-cost price
profit=220-100=120
double the selling price profit=120 rs