Question

by selling 45 lemons for rs 40 a man loses 20%.How many should he sell for rs 24 to gain 20% on the transaction.

Answer 1

sp of 45=Rs 40

sp of 1 =Rs8/9

⇒loss=20%

∴cp=8/9×5/4=10/9

∴cp of 1=10/9

⇒gain =20%

new sp=10/9×6/5=12/9=4/3

sp of 1 =4/3

∴ his sp =Rs 24

⇒ sp of 6 =4×6/3

⇒ sp of 18=Rs 24

∴ he must sells 18 for Rs 24  ANS