Rakesh on selling a lamp for Rs. 450 bears a loss of 20%. To earn a profit of 20%, he should sell the lamp for
1). 675
2). 600
3). 625
4). 680
Let the C.P be x
⇒ x – (20% x) = 450
⇒ (80/100)x = 450
⇒ x = 562.5
∴ Required selling price = 562.5 + (20% of 562.5) = 675