Question

An article is sold at 20% profit. if its cost price is increased by rs. 50 and at the same time if its selling price is also increased by rs. 30, the profit percent decreases by 3.33%. find the cost of the article.

Answer 1

let CP=x
SP=120% of x=1.2x

New CP=x+50
SP=1.2x+30
Ptofit%=(20-3.33)%=16.67%
Now
116.67% of (x+50)=1.2x+30
1.2x-1.1667x=50*1.1667-30
x=850.90(Ans.)