Question

the marked price of an article 50%above the cost price .when marked price increase 20% & selling price increases 20% the profit double orginal marked price is 300 orginal selling price is

Answer 1

The marked price of an article 50%above the cost price 
cost price=c
marked price=300
seeling price=x
we know that  The marked price of an article 50%above the cost price 
so c=[300*100/150]=rupees 200

Let the SP was X.

New MP = 300 + 20% of 300 = 420.So,

New SP = X +20% of X = 1.2X

Now, according to question,

1.2X -200 = 2*(X -200)

1.2X - 200 = 2X - 400

0.8X = 200

X = 250.

Thus, original selling price was Rs. 250.