As the price of salt increased by 20%, 4 kgs of less salt is available for Rs.120. What was the original price of salt per kg?
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Answer: Rs 5/ kg
Step-by-step explanation:
let the original price of salt be x
let the weight(in kg) be purchased when price was not increased be y
when prices not increased : xy = 120 ............(1)
when prices increased : (y-4) ( x + x × 20/100) = 120 .............(2)
on solving both the equations, we get x = 5
therefore the original price of salt was 15/kg
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