Question

A wooden cube first floats inside water when a $200g$ mass is placed on it. When the mass is removed the cube is $2cm$ above water level. The side of cube is:-

• A. $5cm$
• B. $10cm$
• C. $15cm$
• D. $20cm$

Answer 1

Answer: (B)

$10cm$

let l be the side length of the cube
Here $200g$ is supported by $V=2l^{2}c{m}^3$
$⟹1=200/2l^2⟹l^2=100$
$\therefore l=10cm$