a block of metal that weighs 25 N is submerged underwater on to an underwater scale that reads 10 N. what is the volume of the block?

 Q:- a block of metal that weighs 25N is submerged underwater on to an underwater scale that reads 10N. what is the volume of the block?

ANSWER:- 

weight of block , W = 25 N

Underwater weight of block , w = 10 N

Now , buoyant force on block , F = W - w = 25 - 10 = 15 N

Also , we know that 

Buoyant force , F =  ρgV

                         15 = 1000x9.81xV

So, Volume of block , V = 0.001529 cubic meter

Hence , the volume of the block is 0.001529 cubic meter.