If ($$W_1$$​) is the weight of brick at room temperature and ($$W_2$$​) is the brick weight after the brick immersion in water for 24 hours, then the percentage of brick water absorption is calculated as:

Correct option is B

The percentage of brick water absorption can be calculated using the following formula:
Percentage of water absorption = $$\frac{W_2-W_1}{W_1}\times100$$​%
Where $$W_1$$​ is the weight of the dry brick at room temperature and $$W_2$$​ is the weight of the brick after it has been immersed in water for 24 hours.
This formula calculates the percentage increase in weight of the brick due to the water absorbed during immersion. It expresses the percentage of water absorbed by the brick relative to its initial dry weight.