4%of the selling price of an article is equal to 5% of its cost price. Again 20% of the selling price is Rs.120 more than 22% of its cost price. The ratio of cost price & selling price is
Show answer & explanation
Correct answer: C
Explanation
The correct option is 3.
let Selling price be SP, Cost price be CP
4% of SP = 5% CP
SP = 
SP = 
---------> using this in the below equation
20% of SP = 120 + 22% of CP
× = 120 + 22% CP
CP = 120 + 
CP
CP – CP = 120
CP = 120
CP = 4000
SP = 
× 4000 = 5000
CP : SP = 4000 : 5000 = 4 : 5