Raghu sold an article for ₹180 after allowing a 20% discount on its marked price. Had he not allowed any discount, he would have gained 20%. What is the cost price of the article?

₹190.40 ₹192.80 ₹188.60 ₹187.50

₹187.50

SP of the article = 180 MP of the article = 180 × \(\frac{100}{80}\) = 225 CP of the article = 225 × \(\frac{100}{120}\) = 187.5