Total Purchased cost =30×20= Rs. 600 Since, Gian on overall =10% So, The selling price should be =600+10% of 600= Rs. 660 Now, According to the question 30% of total quantity =30% of 20=6kg Selling price of 6kg=6×40=240 Remaining quantity =20−6=14kg Let the selling price of remaining quantity be Rs. x per kg So, 660=240+14x ⇒420=14x ⇒x=