Question

A beaker containing water is placed on the platform of a digital weighing machine. It reads $1100g$. A metal body of density $8g/cc$ and mass $200g$ is suspended in water in the beaker (without touching the walls of the beaker). It is attached by a suitable string fixed to some support. Now the reading of weighing machine will be

• A. $1100g$
• B. $1125g$
• C. $1275g$
• D. $1300g$

Answer 1

The correct option is B $1125g$

Answer is B.
Here, the weight of the beaker containing water placed on the platform of a digital weighing machine reads $1100g$.
Now, a metal body of density $8g/cc$ and mass $200g$ is suspended in water in the beaker.
The total volume of the metal body = total volume of the water that is increased in the beaker.
So, Volume of metal body = Mass of the body/Density of the body = $200/8=25cc$.
Hence, the total weight read on the machine is 1100+25 = 1125 g.