Question

20. A shopkeeper bought locks at the rate of 8 locks for 34 and sold them at the rate of 12 locks for 57.
Calculate:
(1) his gain per cent, and
(11) the number of locks he should sell to earn a profit of 45.
(Hint. Let the number of locks bought be the LCM of 8 and 12)​

Answer 1

Step-by-step explanation:

34×8=272

272+12=282

LCM=24