1.

A shopkeeper bought locks at the rate of 8 locks for rupees 34 and sold them at the rate of 12 locks for rupees 57 . calculate his gain percent and the no. of lockshe should sell to earn profit of rupees 45

Answer»

Cost price for a lock=34/8 =4.25
Selling price for a lock =57/12 =4.75
PROFIT=4.75*4.25=0.50
Profit%=0.50/4.25*100=11.76

Profit is 0.50 for a lock
When selling two lock we get one rupees
To get 45 RS profit =2*45=90
90 locks


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