Help Raj maximize his pay without getting caught

Raj works in a brick factory that produces bricks of variable weights. Raj is given the task of moving bricks from one room to another using a backpack. Raj’s supervisor keeps a close eye on his work due to his laziness. But from his office, Raj’s supervisor can only see the top brick in his opaque backpack. The supervisor wants Raj to carry 40 kilograms weight in a single trip and assumes that fo