A shopkeeper cheats to the extent of 10% while buying as well as selling, by using false weights. His total gain is -
A shopkeeper cheats to the extent of 10% while buying as well as selling, by using false weights. His total gain is -
Explanation
Gain%=(100+common gain%)2100−100∴Gain %=[(100+10)2100−100]%=(12100−10000100)%=21%