Question

A block weights 15 N in air and 12 N when immersed in water.
find the specific gravity of the block

Answer 1

Specific gravity  = (Weight on air) / (Weight in air - Weight of object when submerged in water)
Specific gravity of Block = 15 / 15 - 12 
Specific gravity = 15 /3 
                         = 5 

Answer 2

Answer:

Specific gravity  = (Weight on air) / (Weight in air - Weight of object when submerged in water)

Specific gravity of Block = 15 / 15 - 12

Specific gravity = 15 /3

                        = 5