Two pans of a balance are 46.3 cm apart. the fulcrum of the balance has been shifted 0.633 away from the center by a dishonest shopkeeper.

by what percentage is the true weight of the goods being marked up by the shopkeeper?
answer in units of %

distance of each pan from the center or fulcrum is given as

now if dishonest shopkeeper shifted it by 0.633 cm from center

so distance on each side is given as

now the weight is balance as

now we will have

now we can find the percentage change as

d is the correct answer

conduction, convection, radiation