Answer:
B = 1058.4 N
Step-by-step explanation:
Given that,
The volume of a metal block, V = 0.09 m³
The density of fluid, d = 1200 kg/m³
We need to find the buoyant force when it's Completely immersed in brine. The formula for the buoyant force is given by :

g is acceleration due to gravity

So, the required buoyant force is 1058.4 N.