A piece of wood of mass 40g and uniform cross-sectional area of 2cm2 floats upright in water. The length of the wood immersed is
-
A.
30cm -
B.
40cm -
C.
20cm -
D.
2cm
Correct Answer: Option C
Explanation
Mw displaced = 40g
density = (frac{mass}{text{area x height}})
I = (frac{40}{2times h})
h = 20cm